718064521 has 2 divisors, whose sum is σ = 718064522. Its totient is φ = 718064520.

The previous prime is 718064509. The next prime is 718064551. The reversal of 718064521 is 125460817.

718064521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 582015625 + 136048896 = 24125^2 + 11664^2 .

It is a cyclic number.

It is not a de Polignac number, because 718064521 - 2²⁵ = 684510089 is a prime.

It is not a weakly prime, because it can be changed into another prime (718064551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359032260 + 359032261.

It is an arithmetic number, because the mean of its divisors is an integer number (359032261).

Almost surely, 2^718064521 is an apocalyptic number.

It is an amenable number.

718064521 is a deficient number, since it is larger than the sum of its proper divisors (1).

718064521 is an equidigital number, since it uses as much as digits as its factorization.

718064521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 718064521 is about 26796.7259380694. The cubic root of 718064521 is about 895.4771114886.

The spelling of 718064521 in words is "seven hundred eighteen million, sixty-four thousand, five hundred twenty-one".