656713 has 4 divisors (see below), whose sum is σ = 674500. Its totient is φ = 638928.

The previous prime is 656707. The next prime is 656737. The reversal of 656713 is 317656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 300304 + 356409 = 548^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 656713 - 2⁵ = 656681 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8838 + ... + 8911.

It is an arithmetic number, because the mean of its divisors is an integer number (168625).

2⁶⁵⁶⁷¹³ is an apocalyptic number.

It is an amenable number.

656713 is a deficient number, since it is larger than the sum of its proper divisors (17787).

656713 is a wasteful number, since it uses less digits than its factorization.

656713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17786.

The product of its digits is 3780, while the sum is 28.

The square root of 656713 is about 810.3783067185. The cubic root of 656713 is about 86.9210981475.

It can be divided in two parts, 656 and 713, that added together give a square (1369 = 37²).

The spelling of 656713 in words is "six hundred fifty-six thousand, seven hundred thirteen".