656943 has 24 divisors (see below), whose sum is σ = 1053360. Its totient is φ = 362880.

The previous prime is 656939. The next prime is 656951. The reversal of 656943 is 349656.

It is a happy number.

It is not a de Polignac number, because 656943 - 2² = 656939 is a prime.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656943.

It is not an unprimeable number, because it can be changed into a prime (656923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5973 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (43890).

2⁶⁵⁶⁹⁴³ is an apocalyptic number.

656943 is a deficient number, since it is larger than the sum of its proper divisors (396417).

656943 is a wasteful number, since it uses less digits than its factorization.

656943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 160 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 656943 is about 810.5202033262. The cubic root of 656943 is about 86.9312443956.

The spelling of 656943 in words is "six hundred fifty-six thousand, nine hundred forty-three".