79998613 has 2 divisors, whose sum is σ = 79998614. Its totient is φ = 79998612.

The previous prime is 79998601. The next prime is 79998641. The reversal of 79998613 is 31689997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40030929 + 39967684 = 6327^2 + 6322^2 .

It is a cyclic number.

It is not a de Polignac number, because 79998613 - 2⁹ = 79998101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79998643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39999306 + 39999307.

It is an arithmetic number, because the mean of its divisors is an integer number (39999307).

Almost surely, 2^79998613 is an apocalyptic number.

It is an amenable number.

79998613 is a deficient number, since it is larger than the sum of its proper divisors (1).

79998613 is an equidigital number, since it uses as much as digits as its factorization.

79998613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 79998613 is about 8944.1943740060. The cubic root of 79998613 is about 430.8844478246.

The spelling of 79998613 in words is "seventy-nine million, nine hundred ninety-eight thousand, six hundred thirteen".