31789387925 has 24 divisors (see below), whose sum is σ = 40482507912. Its totient is φ = 24748416000.

The previous prime is 31789387919. The next prime is 31789387933. The reversal of 31789387925 is 52978398713.

It can be written as a sum of positive squares in 12 ways, for example, as 13287403441 + 18501984484 = 115271^2 + 136022^2 .

It is not a de Polignac number, because 31789387925 - 2⁴ = 31789387909 is a prime.

It is a super-2 number, since 2×31789387925² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367865 + ... + 445985.

It is an arithmetic number, because the mean of its divisors is an integer number (1686771163).

Almost surely, 2^31789387925 is an apocalyptic number.

It is an amenable number.

31789387925 is a deficient number, since it is larger than the sum of its proper divisors (8693119987).

31789387925 is a wasteful number, since it uses less digits than its factorization.

31789387925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78569 (or 78564 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 62.

The spelling of 31789387925 in words is "thirty-one billion, seven hundred eighty-nine million, three hundred eighty-seven thousand, nine hundred twenty-five".