79720231 has 8 divisors (see below), whose sum is σ = 83585664. Its totient is φ = 75888120.

The previous prime is 79720213. The next prime is 79720241. The reversal of 79720231 is 13202797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79720231 - 2⁷ = 79720103 is a prime.

It is a super-2 number, since 2×79720231² = 12710630461386722, 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 = 79720193 and 79720202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79720211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3361 + ... + 13066.

It is an arithmetic number, because the mean of its divisors is an integer number (10448208).

Almost surely, 2^79720231 is an apocalyptic number.

79720231 is a deficient number, since it is larger than the sum of its proper divisors (3865433).

79720231 is a wasteful number, since it uses less digits than its factorization.

79720231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16661.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 79720231 is about 8928.6186501608. The cubic root of 79720231 is about 430.3840646495.

The spelling of 79720231 in words is "seventy-nine million, seven hundred twenty thousand, two hundred thirty-one".