656907 has 4 divisors (see below), whose sum is σ = 875880. Its totient is φ = 437936.

The previous prime is 656891. The next prime is 656917. The reversal of 656907 is 709656.

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

It is a cyclic number.

It is not a de Polignac number, because 656907 - 2⁴ = 656891 is a prime.

It is a d-powerful number, because it can be written as 6² + 5 + 9⁶ + 6⁵ + 0 + 7⁶ .

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (656917) 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, 109482 + ... + 109487.

It is an arithmetic number, because the mean of its divisors is an integer number (218970).

2⁶⁵⁶⁹⁰⁷ is an apocalyptic number.

656907 is a deficient number, since it is larger than the sum of its proper divisors (218973).

656907 is a wasteful number, since it uses less digits than its factorization.

656907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218972.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 656907 is about 810.4979950623. The cubic root of 656907 is about 86.9296564436.

The spelling of 656907 in words is "six hundred fifty-six thousand, nine hundred seven".