79308997 has 4 divisors (see below), whose sum is σ = 82043820. Its totient is φ = 76574176.

The previous prime is 79308989. The next prime is 79309051. The reversal of 79308997 is 79980397.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61449921 + 17859076 = 7839^2 + 4226^2 .

It is a cyclic number.

It is not a de Polignac number, because 79308997 - 2³ = 79308989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79308197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367368 + ... + 1367425.

It is an arithmetic number, because the mean of its divisors is an integer number (20510955).

Almost surely, 2^79308997 is an apocalyptic number.

It is an amenable number.

79308997 is a deficient number, since it is larger than the sum of its proper divisors (2734823).

79308997 is a wasteful number, since it uses less digits than its factorization.

79308997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734822.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 79308997 is about 8905.5598925615. The cubic root of 79308997 is about 429.6427481600.

The spelling of 79308997 in words is "seventy-nine million, three hundred eight thousand, nine hundred ninety-seven".