80718613 has 2 divisors, whose sum is σ = 80718614. Its totient is φ = 80718612.

The previous prime is 80718581. The next prime is 80718689. The reversal of 80718613 is 31681708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78180964 + 2537649 = 8842^2 + 1593^2 .

It is a cyclic number.

It is not a de Polignac number, because 80718613 - 2⁵ = 80718581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80712613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40359306 + 40359307.

It is an arithmetic number, because the mean of its divisors is an integer number (40359307).

Almost surely, 2^80718613 is an apocalyptic number.

It is an amenable number.

80718613 is a deficient number, since it is larger than the sum of its proper divisors (1).

80718613 is an equidigital number, since it uses as much as digits as its factorization.

80718613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 80718613 is about 8984.3537886706. The cubic root of 80718613 is about 432.1732647605.

The spelling of 80718613 in words is "eighty million, seven hundred eighteen thousand, six hundred thirteen".