31313793 has 12 divisors (see below), whose sum is σ = 48568560. Its totient is φ = 17893512.

The previous prime is 31313771. The next prime is 31313809. The reversal of 31313793 is 39731313.

It is not a de Polignac number, because 31313793 - 2⁸ = 31313537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31313793.

It is not an unprimeable number, because it can be changed into a prime (31313713) 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, 106363 + ... + 106656.

It is an arithmetic number, because the mean of its divisors is an integer number (4047380).

Almost surely, 2^31313793 is an apocalyptic number.

It is an amenable number.

31313793 is a deficient number, since it is larger than the sum of its proper divisors (17254767).

31313793 is a wasteful number, since it uses less digits than its factorization.

31313793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213036 (or 213029 counting only the distinct ones).

The product of its digits is 5103, while the sum is 30.

The square root of 31313793 is about 5595.8728541667. The cubic root of 31313793 is about 315.1944478449.

The spelling of 31313793 in words is "thirty-one million, three hundred thirteen thousand, seven hundred ninety-three".