|Cardinal||one hundred [and] |
One hundred nine (British English: 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.
One hundred nine 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.