108137990 has 16 divisors (see below), whose sum is σ = 194805648. Its totient is φ = 43220256.

The previous prime is 108137983. The next prime is 108138001. The reversal of 108137990 is 99731801.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11309 + ... + 18551.

It is an arithmetic number, because the mean of its divisors is an integer number (12175353).

Almost surely, 2^108137990 is an apocalyptic number.

108137990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108137990 is a deficient number, since it is larger than the sum of its proper divisors (86667658).

108137990 is a wasteful number, since it uses less digits than its factorization.

108137990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8743.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 108137990 is about 10398.9417730844. The cubic root of 108137990 is about 476.4230491524.

The spelling of 108137990 in words is "one hundred eight million, one hundred thirty-seven thousand, nine hundred ninety".