79231657 has 2 divisors, whose sum is σ = 79231658. Its totient is φ = 79231656.

The previous prime is 79231601. The next prime is 79231667. The reversal of 79231657 is 75613297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70207641 + 9024016 = 8379^2 + 3004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79231657 is a prime.

It is not a weakly prime, because it can be changed into another prime (79231667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39615828 + 39615829.

It is an arithmetic number, because the mean of its divisors is an integer number (39615829).

Almost surely, 2^79231657 is an apocalyptic number.

It is an amenable number.

79231657 is a deficient number, since it is larger than the sum of its proper divisors (1).

79231657 is an equidigital number, since it uses as much as digits as its factorization.

79231657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 79231657 is about 8901.2166022404. The cubic root of 79231657 is about 429.5030440555.

The spelling of 79231657 in words is "seventy-nine million, two hundred thirty-one thousand, six hundred fifty-seven".