31353907679 has 4 divisors (see below), whose sum is σ = 31360286640. Its totient is φ = 31347528720.

The previous prime is 31353907667. The next prime is 31353907681. The reversal of 31353907679 is 97670935313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97670935313 = 7 ⋅13952990759.

It is a cyclic number.

It is not a de Polignac number, because 31353907679 - 2¹² = 31353903583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31353907679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31353907379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3182102 + ... + 3191939.

It is an arithmetic number, because the mean of its divisors is an integer number (7840071660).

Almost surely, 2^31353907679 is an apocalyptic number.

31353907679 is a deficient number, since it is larger than the sum of its proper divisors (6378961).

31353907679 is an equidigital number, since it uses as much as digits as its factorization.

31353907679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6378960.

The product of its (nonzero) digits is 3214890, while the sum is 53.

The spelling of 31353907679 in words is "thirty-one billion, three hundred fifty-three million, nine hundred seven thousand, six hundred seventy-nine".