108109 has 2 divisors, whose sum is σ = 108110. Its totient is φ = 108108.

The previous prime is 108107. The next prime is 108127. The reversal of 108109 is 901801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64009 + 44100 = 253^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 108109 - 2¹ = 108107 is a prime.

Together with 108107, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54054 + 54055.

It is an arithmetic number, because the mean of its divisors is an integer number (54055).

2¹⁰⁸¹⁰⁹ is an apocalyptic number.

It is an amenable number.

108109 is a deficient number, since it is larger than the sum of its proper divisors (1).

108109 is an equidigital number, since it uses as much as digits as its factorization.

108109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 108109 is about 328.7993308996. The cubic root of 108109 is about 47.6380471644.

The spelling of 108109 in words is "one hundred eight thousand, one hundred nine".