657320313 has 8 divisors (see below), whose sum is σ = 943844608. Its totient is φ = 404504784.

The previous prime is 657320309. The next prime is 657320327. The reversal of 657320313 is 313023756.

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

It is not a de Polignac number, because 657320313 - 2² = 657320309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657320813) 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, 8427145 + ... + 8427222.

It is an arithmetic number, because the mean of its divisors is an integer number (117980576).

Almost surely, 2^657320313 is an apocalyptic number.

It is an amenable number.

657320313 is a deficient number, since it is larger than the sum of its proper divisors (286524295).

657320313 is a wasteful number, since it uses less digits than its factorization.

657320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16854383.

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 657320313 is about 25638.2587747296. The cubic root of 657320313 is about 869.4788409953.

The spelling of 657320313 in words is "six hundred fifty-seven million, three hundred twenty thousand, three hundred thirteen".