657056713 has 4 divisors (see below), whose sum is σ = 657138628. Its totient is φ = 656974800.

The previous prime is 657056707. The next prime is 657056717. The reversal of 657056713 is 317650756.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 549996304 + 107060409 = 23452^2 + 10347^2 .

It is a cyclic number.

It is not a de Polignac number, because 657056713 - 2¹⁷ = 656925641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657056717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27438 + ... + 45463.

It is an arithmetic number, because the mean of its divisors is an integer number (164284657).

Almost surely, 2^657056713 is an apocalyptic number.

It is an amenable number.

657056713 is a deficient number, since it is larger than the sum of its proper divisors (81915).

657056713 is an equidigital number, since it uses as much as digits as its factorization.

657056713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81914.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 657056713 is about 25633.1175045097. The cubic root of 657056713 is about 869.3625986996.

The spelling of 657056713 in words is "six hundred fifty-seven million, fifty-six thousand, seven hundred thirteen".