80518013 has 2 divisors, whose sum is σ = 80518014. Its totient is φ = 80518012.

The previous prime is 80517989. The next prime is 80518019. The reversal of 80518013 is 31081508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76510009 + 4008004 = 8747^2 + 2002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80518013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80518019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40259006 + 40259007.

It is an arithmetic number, because the mean of its divisors is an integer number (40259007).

Almost surely, 2^80518013 is an apocalyptic number.

It is an amenable number.

80518013 is a deficient number, since it is larger than the sum of its proper divisors (1).

80518013 is an equidigital number, since it uses as much as digits as its factorization.

80518013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 80518013 is about 8973.1829915588. The cubic root of 80518013 is about 431.8149588316.

The spelling of 80518013 in words is "eighty million, five hundred eighteen thousand, thirteen".