656933 has 4 divisors (see below), whose sum is σ = 659148. Its totient is φ = 654720.

The previous prime is 656923. The next prime is 656939. The reversal of 656933 is 339656.

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 82369 + 574564 = 287^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 656933 - 2⁴ = 656917 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 656933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656939) 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, 578 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (164787).

2⁶⁵⁶⁹³³ is an apocalyptic number.

It is an amenable number.

656933 is a deficient number, since it is larger than the sum of its proper divisors (2215).

656933 is a wasteful number, since it uses less digits than its factorization.

656933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214.

The product of its digits is 14580, while the sum is 32.

The square root of 656933 is about 810.5140344251. The cubic root of 656933 is about 86.9308033036.

The spelling of 656933 in words is "six hundred fifty-six thousand, nine hundred thirty-three".