657717013 has 16 divisors (see below), whose sum is σ = 697351680. Its totient is φ = 619311616.

The previous prime is 657717007. The next prime is 657717017. The reversal of 657717013 is 310717756.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657717013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657717017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480456 + ... + 481822.

It is an arithmetic number, because the mean of its divisors is an integer number (43584480).

Almost surely, 2^657717013 is an apocalyptic number.

It is an amenable number.

657717013 is a deficient number, since it is larger than the sum of its proper divisors (39634667).

657717013 is a wasteful number, since it uses less digits than its factorization.

657717013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 657717013 is about 25645.9940926453. The cubic root of 657717013 is about 869.6537191506.

The spelling of 657717013 in words is "six hundred fifty-seven million, seven hundred seventeen thousand, thirteen".