31139794 has 24 divisors (see below), whose sum is σ = 56214540. Its totient is φ = 12884256.

The previous prime is 31139789. The next prime is 31139807. The reversal of 31139794 is 49793113.

It can be written as a sum of positive squares in 2 ways, for example, as 30969225 + 170569 = 5565^2 + 413^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2637 + ... + 8320.

Almost surely, 2^31139794 is an apocalyptic number.

31139794 is a deficient number, since it is larger than the sum of its proper divisors (25074746).

31139794 is a wasteful number, since it uses less digits than its factorization.

31139794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002 (or 10995 counting only the distinct ones).

The product of its digits is 20412, while the sum is 37.

The square root of 31139794 is about 5580.3041135766. The cubic root of 31139794 is about 314.6095573985.

The spelling of 31139794 in words is "thirty-one million, one hundred thirty-nine thousand, seven hundred ninety-four".