79309231 has 2 divisors, whose sum is σ = 79309232. Its totient is φ = 79309230.

The previous prime is 79309207. The next prime is 79309283. The reversal of 79309231 is 13290397.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79309231 - 2¹¹ = 79307183 is a prime.

It is a super-2 number, since 2×79309231² = 12579908243622722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79309291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39654615 + 39654616.

It is an arithmetic number, because the mean of its divisors is an integer number (39654616).

Almost surely, 2^79309231 is an apocalyptic number.

79309231 is a deficient number, since it is larger than the sum of its proper divisors (1).

79309231 is an equidigital number, since it uses as much as digits as its factorization.

79309231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 79309231 is about 8905.5730304119. The cubic root of 79309231 is about 429.6431707111.

Subtracting from 79309231 its product of nonzero digits (10206), we obtain a square (79299025 = 8905²).

It can be divided in two parts, 7930 and 9231, that added together give a square (17161 = 131²).

The spelling of 79309231 in words is "seventy-nine million, three hundred nine thousand, two hundred thirty-one".