79980013 has 2 divisors, whose sum is σ = 79980014. Its totient is φ = 79980012.

The previous prime is 79979989. The next prime is 79980059. The reversal of 79980013 is 31008997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55398249 + 24581764 = 7443^2 + 4958^2 .

It is a cyclic number.

It is not a de Polignac number, because 79980013 - 2²⁵ = 46425581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79980073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39990006 + 39990007.

It is an arithmetic number, because the mean of its divisors is an integer number (39990007).

Almost surely, 2^79980013 is an apocalyptic number.

It is an amenable number.

79980013 is a deficient number, since it is larger than the sum of its proper divisors (1).

79980013 is an equidigital number, since it uses as much as digits as its factorization.

79980013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 79980013 is about 8943.1545329375. The cubic root of 79980013 is about 430.8510511125.

The spelling of 79980013 in words is "seventy-nine million, nine hundred eighty thousand, thirteen".