31129713 has 12 divisors (see below), whose sum is σ = 45535360. Its totient is φ = 20489976.

The previous prime is 31129699. The next prime is 31129723. The reversal of 31129713 is 31792113.

It is not a de Polignac number, because 31129713 - 2⁸ = 31129457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31129723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21181 + ... + 22602.

Almost surely, 2^31129713 is an apocalyptic number.

It is an amenable number.

31129713 is a deficient number, since it is larger than the sum of its proper divisors (14405647).

31129713 is a wasteful number, since it uses less digits than its factorization.

31129713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43868 (or 43865 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 31129713 is about 5579.4007742768. The cubic root of 31129713 is about 314.5756038313.

The spelling of 31129713 in words is "thirty-one million, one hundred twenty-nine thousand, seven hundred thirteen".