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 |
[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 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.
[edit] In other fields
109 is also:
- The atomic number of meitnerium.
