108137931 has 16 divisors (see below), whose sum is σ = 157465728. Its totient is φ = 65465600.

The previous prime is 108137917. The next prime is 108137947. The reversal of 108137931 is 139731801.

It is a cyclic number.

It is not a de Polignac number, because 108137931 - 2¹⁵ = 108105163 is a prime.

It is a super-2 number, since 2×108137931² = 23387624241921522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 108137892 and 108137901.

It is not an unprimeable number, because it can be changed into a prime (108135931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55036 + ... + 56966.

It is an arithmetic number, because the mean of its divisors is an integer number (9841608).

Almost surely, 2^108137931 is an apocalyptic number.

108137931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

108137931 is a deficient number, since it is larger than the sum of its proper divisors (49327797).

108137931 is a wasteful number, since it uses less digits than its factorization.

108137931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 108137931 is about 10398.9389362569. The cubic root of 108137931 is about 476.4229625071.

The spelling of 108137931 in words is "one hundred eight million, one hundred thirty-seven thousand, nine hundred thirty-one".