109 (number)

Encyclopedia : 1 : 10 : 109 : 109 (number)

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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

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.

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

 

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