31079961 has 48 divisors (see below), whose sum is σ = 52902720. Its totient is φ = 17372160.

The previous prime is 31079959. The next prime is 31079981. The reversal of 31079961 is 16997013.

It is not a de Polignac number, because 31079961 - 2¹ = 31079959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31079911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99141 + ... + 99453.

It is an arithmetic number, because the mean of its divisors is an integer number (1102140).

Almost surely, 2^31079961 is an apocalyptic number.

It is an amenable number.

31079961 is a deficient number, since it is larger than the sum of its proper divisors (21822759).

31079961 is a wasteful number, since it uses less digits than its factorization.

31079961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 31079961 is about 5574.9404481124. The cubic root of 31079961 is about 314.4079279026.

The spelling of 31079961 in words is "thirty-one million, seventy-nine thousand, nine hundred sixty-one".