109 (number)

From Wikipedia, the free encyclopedia

109 is the natural number following 108 and preceding 110.

← 100 101 102 103 104 105 106 107 108 109 → List of numbers — Integers ← 100 110 120 130 140 150 160 170 180 190 →
Cardinal	one hundred [and] nine
Ordinal	109th
Factorization	prime
Roman numeral	CIX
Binary	1101101
Hexadecimal	6D

[edit] In mathematics

One hundred [and] nine is the 29th prime number, and also a Chen prime. The previous prime is 107, making them both twin primes. 109 is a centered triangular number. 109 is the smallest number which is palindromic in bases 5 and 9.

[edit] In other fields

109 is also:

• The atomic number of meitnerium.
• The registry number of the famous patrol boat PT-109, commanded by John F. Kennedy.
• The year AD 109 or 109 BC.
• The Messerschmitt Bf 109 was a World War II fighter
• The 109 Department Store in Shibuya, Tokyo