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109 is a prime number from 101-200. 109 has 2 factors, 1 and 109. It is the 29th prime number, and the fourth prime number from 101-200.

Proofs

  • Yes — 109 can be divided by 1.
  • No — 109 cannot be divided by 2-108.
  • Yes — 109 can be divided by 109.

As an Exponent of Mersenne Number

2109 - 1 is divisible by 745,988,807, and is therefore not a prime number.

Relationship with other odd numbers

The numbers before

  • The previous prime number is 107.
    • There are no odd numbers between 107 and 109. As a result, they are twin primes.
  • The previous prime number before 107 is 103.
    • 103 and 109 are six numbers apart; therefore, they are sexy primes.

The numbers after

  • The next prime number is 113.
    • 109 and 113 are four numbers apart; therefore, they are cousin primes.
  • 127 is the next prime number after 113. It is a huge gap, the largest between 101-200.