79715957 has 2 divisors, whose sum is σ = 79715958. Its totient is φ = 79715956.

The previous prime is 79715899. The next prime is 79715969. The reversal of 79715957 is 75951797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60435076 + 19280881 = 7774^2 + 4391^2 .

It is a cyclic number.

It is not a de Polignac number, because 79715957 - 2⁶ = 79715893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79715257) 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 as a sum of consecutive naturals, namely, 39857978 + 39857979.

It is an arithmetic number, because the mean of its divisors is an integer number (39857979).

Almost surely, 2^79715957 is an apocalyptic number.

It is an amenable number.

79715957 is a deficient number, since it is larger than the sum of its proper divisors (1).

79715957 is an equidigital number, since it uses as much as digits as its factorization.

79715957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 694575, while the sum is 50.

The square root of 79715957 is about 8928.3793042187. The cubic root of 79715957 is about 430.3763731917.

The spelling of 79715957 in words is "seventy-nine million, seven hundred fifteen thousand, nine hundred fifty-seven".