108109139 has 2 divisors, whose sum is σ = 108109140. Its totient is φ = 108109138.

The previous prime is 108109093. The next prime is 108109147. The reversal of 108109139 is 931901801.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108109139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (108109189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54054569 + 54054570.

It is an arithmetic number, because the mean of its divisors is an integer number (54054570).

Almost surely, 2^108109139 is an apocalyptic number.

108109139 is a deficient number, since it is larger than the sum of its proper divisors (1).

108109139 is an equidigital number, since it uses as much as digits as its factorization.

108109139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 108109139 is about 10397.5544720862. The cubic root of 108109139 is about 476.3806758108.

The spelling of 108109139 in words is "one hundred eight million, one hundred nine thousand, one hundred thirty-nine".