979081831 has 32 divisors (see below), whose sum is σ = 1223308800. Its totient is φ = 763012224.

The previous prime is 979081757. The next prime is 979081843. The reversal of 979081831 is 138180979.

It is not a de Polignac number, because 979081831 - 2¹⁷ = 978950759 is a prime.

It is a super-2 number, since 2×979081831² = 1917202463588625122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979081231) 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, 2209896 + ... + 2210338.

It is an arithmetic number, because the mean of its divisors is an integer number (38228400).

Almost surely, 2^979081831 is an apocalyptic number.

979081831 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

979081831 is a deficient number, since it is larger than the sum of its proper divisors (244226969).

979081831 is a wasteful number, since it uses less digits than its factorization.

979081831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 979081831 is about 31290.2833320505. The cubic root of 979081831 is about 992.9780851220.

The spelling of 979081831 in words is "nine hundred seventy-nine million, eighty-one thousand, eight hundred thirty-one".