From Wikipedia, the free encyclopedia.
One hundred nine (also One hundred and nine) (109, CIX) is the natural number following one hundred eight and preceding one hundred ten. It is the 29th prime number. The previous prime is one hundred seven, with which it comprises a twin prime.
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.

