79965757 has 2 divisors, whose sum is σ = 79965758. Its totient is φ = 79965756.

The previous prime is 79965713. The next prime is 79965761. The reversal of 79965757 is 75756997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57441241 + 22524516 = 7579^2 + 4746^2 .

It is a cyclic number.

It is not a de Polignac number, because 79965757 - 2⁷ = 79965629 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79965698 and 79965707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79965707) 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, 39982878 + 39982879.

It is an arithmetic number, because the mean of its divisors is an integer number (39982879).

Almost surely, 2^79965757 is an apocalyptic number.

It is an amenable number.

79965757 is a deficient number, since it is larger than the sum of its proper divisors (1).

79965757 is an equidigital number, since it uses as much as digits as its factorization.

79965757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4167450, while the sum is 55.

The square root of 79965757 is about 8942.3574632196. The cubic root of 79965757 is about 430.8254506433.

The spelling of 79965757 in words is "seventy-nine million, nine hundred sixty-five thousand, seven hundred fifty-seven".