31020939 has 12 divisors (see below), whose sum is σ = 47166600. Its totient is φ = 19592064.

The previous prime is 31020919. The next prime is 31020947. The reversal of 31020939 is 93902013.

It is not a de Polignac number, because 31020939 - 2⁵ = 31020907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90534 + ... + 90875.

It is an arithmetic number, because the mean of its divisors is an integer number (3930550).

Almost surely, 2^31020939 is an apocalyptic number.

31020939 is a deficient number, since it is larger than the sum of its proper divisors (16145661).

31020939 is a wasteful number, since it uses less digits than its factorization.

31020939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181434 (or 181431 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 31020939 is about 5569.6444231207. The cubic root of 31020939 is about 314.2087776749.

The spelling of 31020939 in words is "thirty-one million, twenty thousand, nine hundred thirty-nine".