79913231 has 4 divisors (see below), whose sum is σ = 79933464. Its totient is φ = 79893000.

The previous prime is 79913203. The next prime is 79913237. The reversal of 79913231 is 13231997.

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 79913231 - 2¹⁰ = 79912207 is a prime.

It is a super-2 number, since 2×79913231² = 12772248977718722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79913191 and 79913200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79913237) 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, 2045 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (19983366).

Almost surely, 2^79913231 is an apocalyptic number.

79913231 is a deficient number, since it is larger than the sum of its proper divisors (20233).

79913231 is a wasteful number, since it uses less digits than its factorization.

79913231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20232.

The product of its digits is 10206, while the sum is 35.

The square root of 79913231 is about 8939.4200594893. The cubic root of 79913231 is about 430.7310998651.

The spelling of 79913231 in words is "seventy-nine million, nine hundred thirteen thousand, two hundred thirty-one".