31986674971 has 8 divisors (see below), whose sum is σ = 33674296320. Its totient is φ = 30299464872.

The previous prime is 31986674873. The next prime is 31986674983. The reversal of 31986674971 is 17947668913.

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

It is a cyclic number.

It is not a de Polignac number, because 31986674971 - 2⁷ = 31986674843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31986677971) 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, 63786 + ... + 260848.

It is an arithmetic number, because the mean of its divisors is an integer number (4209287040).

Almost surely, 2^31986674971 is an apocalyptic number.

31986674971 is a deficient number, since it is larger than the sum of its proper divisors (1687621349).

31986674971 is a wasteful number, since it uses less digits than its factorization.

31986674971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205625.

The product of its digits is 13716864, while the sum is 61.

The spelling of 31986674971 in words is "thirty-one billion, nine hundred eighty-six million, six hundred seventy-four thousand, nine hundred seventy-one".