31079980347 has 32 divisors (see below), whose sum is σ = 44828931840. Its totient is φ = 19040054400.

The previous prime is 31079980343. The next prime is 31079980381. The reversal of 31079980347 is 74308997013.

It is not a de Polignac number, because 31079980347 - 2² = 31079980343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31079980347.

It is not an unprimeable number, because it can be changed into a prime (31079980343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17371929 + ... + 17373717.

It is an arithmetic number, because the mean of its divisors is an integer number (1400904120).

Almost surely, 2^31079980347 is an apocalyptic number.

31079980347 is a deficient number, since it is larger than the sum of its proper divisors (13748951493).

31079980347 is a wasteful number, since it uses less digits than its factorization.

31079980347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The spelling of 31079980347 in words is "thirty-one billion, seventy-nine million, nine hundred eighty thousand, three hundred forty-seven".