656631313 has 8 divisors (see below), whose sum is σ = 722187648. Its totient is φ = 593224464.

The previous prime is 656631299. The next prime is 656631377. The reversal of 656631313 is 313136656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656631313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656631383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536731 + ... + 537952.

It is an arithmetic number, because the mean of its divisors is an integer number (90273456).

Almost surely, 2^656631313 is an apocalyptic number.

It is an amenable number.

656631313 is a deficient number, since it is larger than the sum of its proper divisors (65556335).

656631313 is a wasteful number, since it uses less digits than its factorization.

656631313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074743.

The product of its digits is 29160, while the sum is 34.

The square root of 656631313 is about 25624.8183017948. The cubic root of 656631313 is about 869.1749402709.

Adding to 656631313 its reverse (313136656), we get a palindrome (969767969).

The spelling of 656631313 in words is "six hundred fifty-six million, six hundred thirty-one thousand, three hundred thirteen".