31627397979 has 12 divisors (see below), whose sum is σ = 45689189832. Its totient is φ = 21082545600.

The previous prime is 31627397959. The next prime is 31627397981. The reversal of 31627397979 is 97979372613.

It is not a de Polignac number, because 31627397979 - 2⁵ = 31627397947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31627397959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112977 + ... + 275714.

It is an arithmetic number, because the mean of its divisors is an integer number (3807432486).

Almost surely, 2^31627397979 is an apocalyptic number.

31627397979 is a deficient number, since it is larger than the sum of its proper divisors (14061791853).

31627397979 is a wasteful number, since it uses less digits than its factorization.

31627397979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397738 (or 397735 counting only the distinct ones).

The product of its digits is 27005076, while the sum is 63.

The spelling of 31627397979 in words is "thirty-one billion, six hundred twenty-seven million, three hundred ninety-seven thousand, nine hundred seventy-nine".