79985597 has 2 divisors, whose sum is σ = 79985598. Its totient is φ = 79985596.

The previous prime is 79985539. The next prime is 79985599. The reversal of 79985597 is 79558997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 17480761 = 7906^2 + 4181^2 .

It is a cyclic number.

It is not a de Polignac number, because 79985597 - 2⁸ = 79985341 is a prime.

Together with 79985599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79985599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39992798 + 39992799.

It is an arithmetic number, because the mean of its divisors is an integer number (39992799).

Almost surely, 2^79985597 is an apocalyptic number.

It is an amenable number.

79985597 is a deficient number, since it is larger than the sum of its proper divisors (1).

79985597 is an equidigital number, since it uses as much as digits as its factorization.

79985597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 59.

The square root of 79985597 is about 8943.4667215795. The cubic root of 79985597 is about 430.8610778520.

The spelling of 79985597 in words is "seventy-nine million, nine hundred eighty-five thousand, five hundred ninety-seven".