79311986 has 16 divisors (see below), whose sum is σ = 128798208. Its totient is φ = 36411600.

The previous prime is 79311977. The next prime is 79312001. The reversal of 79311986 is 68911397.

It is a super-2 number, since 2×79311986² = 12580782246528392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3020 + ... + 12951.

It is an arithmetic number, because the mean of its divisors is an integer number (8049888).

Almost surely, 2^79311986 is an apocalyptic number.

79311986 is a deficient number, since it is larger than the sum of its proper divisors (49486222).

79311986 is a wasteful number, since it uses less digits than its factorization.

79311986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16177.

The product of its digits is 81648, while the sum is 44.

The square root of 79311986 is about 8905.7277074925. The cubic root of 79311986 is about 429.6481455554.

The spelling of 79311986 in words is "seventy-nine million, three hundred eleven thousand, nine hundred eighty-six".