656847 has 12 divisors (see below), whose sum is σ = 965640. Its totient is φ = 430128.

The previous prime is 656839. The next prime is 656891. The reversal of 656847 is 748656.

It is a happy number.

656847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 656847 - 2³ = 656839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (80470).

2⁶⁵⁶⁸⁴⁷ is an apocalyptic number.

656847 is a deficient number, since it is larger than the sum of its proper divisors (308793).

656847 is a wasteful number, since it uses less digits than its factorization.

656847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1299 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 656847 is about 810.4609799367. The cubic root of 656847 is about 86.9270097279.

Subtracting 656847 from its reverse (748656), we obtain a square (91809 = 303²).

The spelling of 656847 in words is "six hundred fifty-six thousand, eight hundred forty-seven".