47 (number)

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← 40 41 42 43 44 45 46 47 48 49 → List of numbers — Integers 0 10 20 30 40 50 60 70 80 90 →
Cardinal	47 forty-seven
Ordinal	47th forty-seventh
Factorization	prime
Divisors	1, 47
Roman numeral	XLVII
Binary	00101111
Hexadecimal	2F

47 (forty-seven) is the natural number following 46 and preceding 48.

1 In mathematics
2 In science
- 2.1 Astronomy
3 In pop culture
4 In music
5 In sports
6 Interesting Facts
7 Historical years
8 See also
9 References
10 External links

[edit] In mathematics

Forty-seven is the 15^th prime number, a safe prime, a supersingular prime, and the 6^th Lucas prime. 47 is a highly cototient number. It is an Eisenstein prime with no imaginary part and real part of the form $3 n - 1$ .

It is also a Keith number, because it recurs in a Fibonacci-like sequence started from its base 10 digits: 4, 7, 11, 18, 29, 47...

47 is a strictly non-palindromic number.

Its representation in binary being 00101111, 47 is a prime Thabit number, and as such is related to the pair of amicable numbers {17296, 18416}.

47 is a Carol number.

[edit] In science

The atomic number of silver

[edit] Astronomy

Messier object M47, a magnitude 4.5 open cluster in the constellation Puppis
The New General Catalogue object NGC 47,^[1] a barred spiral galaxy in the constellation Cetus. This object is also designated as NGC 58.
The Saros number of the solar eclipse series which began on 1306 BC April 2 and ended on 26 BC May 10.^[2] The duration of Saros series 47 was 1280.1 years, and it contained 72 solar eclipses.
The Saros number of the lunar eclipse series which began on 1275 BC July 31 and ended on 258 February 5.^[3] The duration of Saros series 47 was 1537.5 years, and it contained 86 lunar eclipses.

[edit] In pop culture

Sev Trek's answer to the 47 conspiracy

There exists a 47 society,^[4] an outgrowth of a movement started at Pomona College, California, USA, which propagates the belief (or, to some, the inside joke) that the number forty-seven occurs in nature with noticeably higher frequency than other natural numbers. The origin of 47 lore at Pomona appears to be a mathematical proof, written in 1964 by Professor Donald Bentley, which supposedly demonstrated that all numbers are equal to 47. However, the proof mentioned above was used by Professor Bentley as a "joke proof" to introduce his students to the concept of mathematical proofs, and is not mathematically valid.

Joe Menosky, who graduated from Pomona College in 1979 and went on to become one of the story writers of Star Trek: The Next Generation, "infected" other Star Trek writers with it, and as a result the number (or its reverse, 74) occurs in some way or other in almost every episode of this program and its spin-offs Star Trek: Deep Space Nine, Star Trek: Voyager and Star Trek: Enterprise. The number might be mentioned in the dialogue, appear on a computer screen a character is looking at, or be a substring of a larger number. The number also appears on some of the DVD menu screens for the episodes. They range from extremely obvious (for example, "shields are down to 47%"), to very well hidden. Some examples are listed here:

In the TNG episode "Darmok," Worf reports a particle gradient of 4/7.
In the DS9 episode "Whispers," the planet Parada 4 has seven moons.
In the Voyager episode "Non Sequitur," Harry Kim lives in apartment 4-G, G being the seventh letter of the alphabet. The intentionality of this reference to 47 was confirmed by Brannon Braga, the writer of that episode.^[5]

According to a joke by Rick Berman (the co-creator and executive producer of several Star Trek series), "47 is 42, corrected for inflation".

The Star Wars franchise references the number in the form of the T-47 Snowspeeders in The Empire Strikes Back (1980), mentioned in dialog by Luke Skywalker. Also, during the Battle of Endor, an aide to Admiral Ackbar mentions that enemy ships have been spotted in sector 47, leading Ackbar to proclaim "It's a trap!".

The number 47 has also been spotted in The Simpsons, Law & Order, NYPD Blue, Threshold, Firefly, Alias, Battlestar Galactica, Lost, Scrubs, South Park, Red Dwarf, Supernatural, the Nicktoon Doug, and The West Wing.

The number 47 has appeared in nearly every episode of the TV show Alias, from being a casino's access code, "4747," in "The Coup," to being Milo Rambaldi's favorite number, as he made Page 47 of all his manuscripts the most important.
In season 4 of Scrubs, the main character, J.D, moves out into his own apartment, whose number is 47.
In season 2 of Supernatural, the character Dean Winchester faces a reaper in the hospital room 4747 in the episode "In my Time of Dying".
In the Nicktoon Doug, the very nerdy, twin characters of Al and Moo Sleech can barely contain their laughter after one whispers "47" to the other in the episode "Doug and the Weird Kids."

47 also has been placed in video games in the same deliberate way for almost 20 years. Examples include Earl Weaver Baseball (the batter's uniform number is 47), Hitman (the name of the main character is Agent 47, commonly referred to as simply "47"), Star Wars: Knights of the Old Republic (HK-47), and Half-Life 2: Episode One (starting player health is 47).

In the 2004 film "Man on Fire", the main character needs a PIN for an ATM card. The PIN is 4747. In the English lines, it's consistently read digit by digit (4-7-4-7), though in the Spanish ones, it's read in pairs (47-47).

In the "Toy Story" films, Buzz Lightyear comes from the G (Gamma) Quadrant of Sector 4, G is the 7th letter of the alphabet, giving us 74, the reverse of 47.

The number 47 appears on the arm of Magneto in the movie "X-Men: The Last Stand" when he reveals the serial number he received during The Holocaust.

In a Garfield cartoon, Garfield hands Jon the remains of a gravy boat, informing him that he accidentally dropped it. As Jon looks at the remains in sadness, mentioning that Garfield had a particular detestation of that gravy boat, Garfield walks away, in a thought bubble explaining that it took him 47 "accidental" drops to break it.

In the 2006 film Talladega Nights: The Ballad of Ricky Bobby, 47 is the number of Cal Naughton, Jr.'s (John C. Reilly) race car.

In the season 4 episode of The O.C., The French Connection, the most scandalous page of an erotic tell-all book about Taylor is 47.

In David Lynch's 2006 film "INLAND EMPIRE" the number 47 recurs in at least a pair of occasions, as the number of a hotel room. There's also a dialogue regarding a bus to reach Pomona.

[edit] In music

Black 47, an Irish-American rock band
In 1998, Japanese electronic musician Takako Minekawa released the album Cloudy Cloud Calculator, which featured a song about the number 47 entitled "Kangaroo Pocket Calculator". The song repeatedly states that "47 is a magical number. 47 plus 2 equals 49. 47 times 2 equals 94. 49 and 94. 94 and 49. Relationship between 47 and 2... is magic" and eventually concludes "Isn't it a coincidence?"
Leslie Sarony published his song "Forty-Seven Ginger-Headed Sailors" in 1928.^[6]
47 is the usual number strings of a harp
47 is a song by Sunny Day Real Estate
47 appears in the lyrics of track number five "Run run run" on The Velvet Underground's "The Velvet Underground & Nico."
On the front cover of the Koxbox record "The great unknown" you can find the number 47 following three dots in the lower leftside corner.

[edit] In sports

47 is:

The jersey number of former baseball pitching great Jack Morris.
The jersey number of NBA star Andrei Kirilenko. His shoes are custom made by Nike and have "AK-47" embroidered on them.
The jersey number of former Ohio State, and current Green Bay Packers linebacker A.J. Hawk.
The jersey number of Denver Broncos and Tampa Bay Buccaneers safety John Lynch.
The jersey number of Washington Redskins tight end Chris Cooley.
The jersey number of New York Mets pitcher Tom Glavine.

[edit] Interesting Facts

Forty-seven:

noted as the number of miracles performed by Jesus listed in the New Testament
the code for international direct dial phone calls to Norway
the model number of the Douglas C-47 Dakota transport plane
the model number of the Republic P-47 Thunderbolt WWII fighter bomber
the title of an award-winning novel by Walter Mosley
In Lucky Number Slevin, Nick Fischer's apartment is number 47.
Group 47, a literary association in post-World War II Germany
In the 1976 movie The Omen, the priest that warns Robert Thorn about Damien has 47 crosses nailed to his walls.^[7]
the number of the French département Lot-et-Garonne
the High Peaks of the Adirondacks are generally recognized as having 46 peaks, but a later survey added one more peak to make 47
the number of samurai involved in the famous historical Ako vendetta; sometimes referred to as the 47 Ronin
the number of bullets that killed Pancho Villa in 1923
the model number of the AK-47 assault rifle
The number of the main character "Ray Garraty" in the Stephen King Richard Bachman novel The Long Walk. Coincidentally, Stephen King was born in 1947.
The 47th state of the Union is New Mexico
At age 47, Edward Jenner (1749-1823) pioneered the use of vaccination against smallpox.
The PBS documentary 'West 47th Street' debuted August 19, 2003
Los del Rio's 1993 song "Macarena" mentions Macarena 47 times
The Elvis Presley song "Jailhouse Rock" goes, "Well number 47 said to number 3”
47 Productions is the name of Ordeal By Fire's videos on YouTube.
The military helicopter CH-47 Chinook
On November 13, 2006, Apple Computers expanded their new Intel Mac line into 47 Best Buy stores. Apple Computer's first attempt to work with Intel was titled the "Star Trek" project; Star Trek being an active contributor to the 47.
When asked for a random number 1-100, 47 is the most common, at 7%.^{[citation needed]}
The 47th street in New York is the United States Diamond district. With over 2,600 businesses related to diamonds and jewelery this street brings in over 90 percent of the diamonds coming into USA
In television advertising, the antacid Rolaids was advertised as consuming "47 times its weight in excess stomach acid"; the ads for Crest toothpaste bragged that the product's users had "47 percent fewer cavities"!
In the 1947 World Series, one team (the Brooklyn Dodgers) went the whole seven-game series without one pitcher registering a complete game; Al Gionfriddo made a sensational catch of a long fly by Joe DiMaggio; and Bill Bevens almost pitched the first World Series no-hitter when Cookie Lavagetto broke it up with a game-winning double.
In the Family Guy episode "Saving Private Brian", one of the random numbers Stewie says into his walkie-talkie is 47.
Faygo pop was created on November 4th, 1907. ( Fourth day of the month, seventh day of the new century. )
In the Rocko's Modern Life episode "To Heck And Back", the very first ( and one of the few ) numbers Heffer orders off the menu at Chokey Chicken is number 47.