79957075997 has 2 divisors, whose sum is σ = 79957075998. Its totient is φ = 79957075996.

The previous prime is 79957075951. The next prime is 79957076039.

79957075997 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78728503396 + 1228572601 = 280586^2 + 35051^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 79957075997 - 2²⁶ = 79889967133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79957075927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39978537998 + 39978537999.

It is an arithmetic number, because the mean of its divisors is an integer number (39978537999).

Almost surely, 2^79957075997 is an apocalyptic number.

It is an amenable number.

79957075997 is a deficient number, since it is larger than the sum of its proper divisors (1).

79957075997 is an equidigital number, since it uses as much as digits as its factorization.

79957075997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393824025, while the sum is 74.

The spelling of 79957075997 in words is "seventy-nine billion, nine hundred fifty-seven million, seventy-five thousand, nine hundred ninety-seven".