879087631 has 4 divisors (see below), whose sum is σ = 883029952. Its totient is φ = 875145312.

The previous prime is 879087619. The next prime is 879087647. The reversal of 879087631 is 136780978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136780978 = 2 ⋅68390489.

It is a cyclic number.

It is not a de Polignac number, because 879087631 - 2¹⁵ = 879054863 is a prime.

It is a super-2 number, since 2×879087631² = 1545590125954384322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879087661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970826 + ... + 1971271.

It is an arithmetic number, because the mean of its divisors is an integer number (220757488).

Almost surely, 2^879087631 is an apocalyptic number.

879087631 is a deficient number, since it is larger than the sum of its proper divisors (3942321).

879087631 is a wasteful number, since it uses less digits than its factorization.

879087631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942320.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 879087631 is about 29649.4119840512. The cubic root of 879087631 is about 957.9526793978.

The spelling of 879087631 in words is "eight hundred seventy-nine million, eighty-seven thousand, six hundred thirty-one".