656949 has 8 divisors (see below), whose sum is σ = 914112. Its totient is φ = 418880.

The previous prime is 656939. The next prime is 656951. The reversal of 656949 is 949656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656949 - 2⁵ = 656917 is a prime.

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

It is a Curzon number.

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 656949.

It is not an unprimeable number, because it can be changed into a prime (656939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4692 + ... + 4829.

It is an arithmetic number, because the mean of its divisors is an integer number (114264).

2⁶⁵⁶⁹⁴⁹ is an apocalyptic number.

656949 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

656949 is a deficient number, since it is larger than the sum of its proper divisors (257163).

656949 is a wasteful number, since it uses less digits than its factorization.

656949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547.

The product of its digits is 58320, while the sum is 39.

The square root of 656949 is about 810.5239046444. The cubic root of 656949 is about 86.9315090486.

It can be divided in two parts, 65694 and 9, that added together give a triangular number (65703 = T₃₆₂).

The spelling of 656949 in words is "six hundred fifty-six thousand, nine hundred forty-nine".