79972231 has 2 divisors, whose sum is σ = 79972232. Its totient is φ = 79972230.

The previous prime is 79972223. The next prime is 79972279. The reversal of 79972231 is 13227997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79972231 - 2³ = 79972223 is a prime.

It is a super-2 number, since 2×79972231² = 12791115462234722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79972931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39986115 + 39986116.

It is an arithmetic number, because the mean of its divisors is an integer number (39986116).

Almost surely, 2^79972231 is an apocalyptic number.

79972231 is a deficient number, since it is larger than the sum of its proper divisors (1).

79972231 is an equidigital number, since it uses as much as digits as its factorization.

79972231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 79972231 is about 8942.7194409754. The cubic root of 79972231 is about 430.8370768227.

The spelling of 79972231 in words is "seventy-nine million, nine hundred seventy-two thousand, two hundred thirty-one".