656625313 has 4 divisors (see below), whose sum is σ = 691184560. Its totient is φ = 622066068.

The previous prime is 656625251. The next prime is 656625349. The reversal of 656625313 is 313526656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656625313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656625113) 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, 17279595 + ... + 17279632.

It is an arithmetic number, because the mean of its divisors is an integer number (172796140).

Almost surely, 2^656625313 is an apocalyptic number.

It is an amenable number.

656625313 is a deficient number, since it is larger than the sum of its proper divisors (34559247).

656625313 is a wasteful number, since it uses less digits than its factorization.

656625313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34559246.

The product of its digits is 97200, while the sum is 37.

The square root of 656625313 is about 25624.7012275265. The cubic root of 656625313 is about 869.1722928870.

The spelling of 656625313 in words is "six hundred fifty-six million, six hundred twenty-five thousand, three hundred thirteen".