31387373679 has 8 divisors (see below), whose sum is σ = 42423117232. Its totient is φ = 20638272960.

The previous prime is 31387373651. The next prime is 31387373749. The reversal of 31387373679 is 97637378313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-31387373679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31387373879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71660452 + ... + 71660889.

It is an arithmetic number, because the mean of its divisors is an integer number (5302889654).

Almost surely, 2^31387373679 is an apocalyptic number.

31387373679 is a deficient number, since it is larger than the sum of its proper divisors (11035743553).

31387373679 is a wasteful number, since it uses less digits than its factorization.

31387373679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143321417.

The product of its digits is 12002256, while the sum is 57.

The spelling of 31387373679 in words is "thirty-one billion, three hundred eighty-seven million, three hundred seventy-three thousand, six hundred seventy-nine".