31798923 has 16 divisors (see below), whose sum is σ = 45776640. Its totient is φ = 19518624.

The previous prime is 31798889. The next prime is 31798927. The reversal of 31798923 is 32989713.

It is not a de Polignac number, because 31798923 - 2⁶ = 31798859 is a prime.

It is a super-2 number, since 2×31798923² = 2022343007919858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31798927) 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, 19618 + ... + 21176.

It is an arithmetic number, because the mean of its divisors is an integer number (2861040).

Almost surely, 2^31798923 is an apocalyptic number.

31798923 is a deficient number, since it is larger than the sum of its proper divisors (13977717).

31798923 is a wasteful number, since it uses less digits than its factorization.

31798923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098.

The product of its digits is 81648, while the sum is 42.

The square root of 31798923 is about 5639.0533780059. The cubic root of 31798923 is about 316.8138338420.

The spelling of 31798923 in words is "thirty-one million, seven hundred ninety-eight thousand, nine hundred twenty-three".