79180457 has 2 divisors, whose sum is σ = 79180458. Its totient is φ = 79180456.

The previous prime is 79180447. The next prime is 79180511. The reversal of 79180457 is 75408197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78570496 + 609961 = 8864^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 79180457 - 2¹⁴ = 79164073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79180427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39590228 + 39590229.

It is an arithmetic number, because the mean of its divisors is an integer number (39590229).

Almost surely, 2^79180457 is an apocalyptic number.

It is an amenable number.

79180457 is a deficient number, since it is larger than the sum of its proper divisors (1).

79180457 is an equidigital number, since it uses as much as digits as its factorization.

79180457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 79180457 is about 8898.3401261134. The cubic root of 79180457 is about 429.4105082552.

The spelling of 79180457 in words is "seventy-nine million, one hundred eighty thousand, four hundred fifty-seven".