79995257 has 2 divisors, whose sum is σ = 79995258. Its totient is φ = 79995256.

The previous prime is 79995241. The next prime is 79995271. The reversal of 79995257 is 75259997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79995136 + 121 = 8944^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 79995257 - 2⁴ = 79995241 is a prime.

It is a super-2 number, since 2×79995257² = 12798482284992098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79995199 and 79995208.

It is not a weakly prime, because it can be changed into another prime (79995277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39997628 + 39997629.

It is an arithmetic number, because the mean of its divisors is an integer number (39997629).

Almost surely, 2^79995257 is an apocalyptic number.

It is an amenable number.

79995257 is a deficient number, since it is larger than the sum of its proper divisors (1).

79995257 is an equidigital number, since it uses as much as digits as its factorization.

79995257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1786050, while the sum is 53.

The square root of 79995257 is about 8944.0067643087. The cubic root of 79995257 is about 430.8784224350.

The spelling of 79995257 in words is "seventy-nine million, nine hundred ninety-five thousand, two hundred fifty-seven".