- 109 (number)
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109 (one hundred [and] nine) is the natural number following 108 and preceding 110.
109 Cardinal one hundred [and] nine Ordinal 109th
(one hundred [and] ninth)Numeral system 109 Factorization prime Prime 29th Divisors 1, 109 Roman numeral CIX Binary 11011012 Octal 1558 Duodecimal 9112 Hexadecimal 6D16 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 factor of one more than the product of the first twenty-three terms of the Euclid–Mullin sequence, making it the twenty-fourth term.
109 is the smallest number which is palindromic in bases 5 and 9.
The cycle of the decimal equivalent of 1/109 ends ...853211, the first six Fibonacci numbers in reversed order.
In other fields
109 is also:
- The atomic number of meitnerium.
See also
Categories:- Integers
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