79939231 has 4 divisors (see below), whose sum is σ = 80951200. Its totient is φ = 78927264.

The previous prime is 79939229. The next prime is 79939247. The reversal of 79939231 is 13293997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13293997 = 47 ⋅282851.

It is a cyclic number.

It is not a de Polignac number, because 79939231 - 2¹ = 79939229 is a prime.

It is a super-2 number, since 2×79939231² = 12780561305742722, 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 (79939031) 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, 505866 + ... + 506023.

It is an arithmetic number, because the mean of its divisors is an integer number (20237800).

Almost surely, 2^79939231 is an apocalyptic number.

79939231 is a deficient number, since it is larger than the sum of its proper divisors (1011969).

79939231 is a wasteful number, since it uses less digits than its factorization.

79939231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011968.

The product of its digits is 91854, while the sum is 43.

The square root of 79939231 is about 8940.8741742628. The cubic root of 79939231 is about 430.7778080015. Note that the first 3 decimals are identical.

The spelling of 79939231 in words is "seventy-nine million, nine hundred thirty-nine thousand, two hundred thirty-one".