108931 has 4 divisors (see below), whose sum is σ = 110152. Its totient is φ = 107712.

The previous prime is 108929. The next prime is 108943. The reversal of 108931 is 139801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 108931 - 2¹ = 108929 is a prime.

It is a super-2 number, since 2×108931² = 23731925522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465 + ... + 658.

It is an arithmetic number, because the mean of its divisors is an integer number (27538).

2¹⁰⁸⁹³¹ is an apocalyptic number.

108931 is a deficient number, since it is larger than the sum of its proper divisors (1221).

108931 is an equidigital number, since it uses as much as digits as its factorization.

108931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 108931 is about 330.0469663548. The cubic root of 108931 is about 47.7584800779.

The spelling of 108931 in words is "one hundred eight thousand, nine hundred thirty-one".