49 (number)

From Wikipedia, the free encyclopedia

49 (forty-nine) is the natural number following 48 and preceding 50.


Cardinal 49
forty-nine
Ordinal 49th
forty-ninth
Factorization 7^2 \,\!
Divisors 1, 7, 49
Roman numeral XLIX
Binary 0110001
Hexadecimal 31

Contents

[edit] In mathematics

Forty-nine is the square of 7. It is a centered octagonal number, and a Somer pseudoprime based on 8.

It appears in the Padovan sequence, preceded by the terms 21, 28, 37 (it is the sum of the first two of these).

[edit] In science

[edit] Astronomy

  • The Saros number of the lunar eclipse series which began on -1217 June 21 and ended on 81 August 8. The duration of Saros series 49 was 1298.1 years, and it contained 73 lunar eclipses.

[edit] In religion

  • On the Hebrew calendar, the number of days of the Counting of the Omer
  • The number of days and night Siddhartha Gautama spent meditating as a holy man
  • In the same year the King James Version of the Bible was written, William Shakespeare was believed to be 49. In Psalm 49, the 49th word from the beginning is Shake, and the 49th word from the end is Spear.

[edit] In other fields

Forty-nine is:

[edit] Sports

[edit] Historical years