656748313 has 8 divisors (see below), whose sum is σ = 710934728. Its totient is φ = 603085824.

The previous prime is 656748283. The next prime is 656748317. The reversal of 656748313 is 313847656.

656748313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 656743129 = 72^2 + 25627^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 656748313 - 2²¹ = 654651161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 656748313.

It is not an unprimeable number, because it can be changed into a prime (656748317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128370 + ... + 133387.

It is an arithmetic number, because the mean of its divisors is an integer number (88866841).

Almost surely, 2^656748313 is an apocalyptic number.

It is an amenable number.

656748313 is a deficient number, since it is larger than the sum of its proper divisors (54186415).

656748313 is a wasteful number, since it uses less digits than its factorization.

656748313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261963.

The product of its digits is 362880, while the sum is 43.

The square root of 656748313 is about 25627.1011431258. The cubic root of 656748313 is about 869.2265610341.

The spelling of 656748313 in words is "six hundred fifty-six million, seven hundred forty-eight thousand, three hundred thirteen".