656849 has 8 divisors (see below), whose sum is σ = 698880. Its totient is φ = 615600.

The previous prime is 656839. The next prime is 656891. The reversal of 656849 is 948656.

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

It is not a de Polignac number, because 656849 - 2⁴ = 656833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (656809) 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, 3344 + ... + 3534.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2⁶⁵⁶⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

656849 is a deficient number, since it is larger than the sum of its proper divisors (42031).

656849 is a wasteful number, since it uses less digits than its factorization.

656849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its digits is 51840, while the sum is 38.

The square root of 656849 is about 810.4622138015. The cubic root of 656849 is about 86.9270979543.

The spelling of 656849 in words is "six hundred fifty-six thousand, eight hundred forty-nine".