79873631 has 4 divisors (see below), whose sum is σ = 79915512. Its totient is φ = 79831752.

The previous prime is 79873601. The next prime is 79873643. The reversal of 79873631 is 13637897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79873631 - 2²² = 75679327 is a prime.

It is a super-2 number, since 2×79873631² = 12759593858248322, 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 (79873601) 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, 17936 + ... + 21941.

It is an arithmetic number, because the mean of its divisors is an integer number (19978878).

Almost surely, 2^79873631 is an apocalyptic number.

79873631 is a deficient number, since it is larger than the sum of its proper divisors (41881).

79873631 is a wasteful number, since it uses less digits than its factorization.

79873631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41880.

The product of its digits is 190512, while the sum is 44.

The square root of 79873631 is about 8937.2048762463. The cubic root of 79873631 is about 430.6599403105.

The spelling of 79873631 in words is "seventy-nine million, eight hundred seventy-three thousand, six hundred thirty-one".