647956 has 12 divisors (see below), whose sum is σ = 1183392. Its totient is φ = 309848.

The previous prime is 647953. The next prime is 647963. The reversal of 647956 is 659746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3430 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (98616).

2⁶⁴⁷⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

647956 is a deficient number, since it is larger than the sum of its proper divisors (535436).

647956 is a wasteful number, since it uses less digits than its factorization.

647956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070 (or 7068 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 647956 is about 804.9571417163. The cubic root of 647956 is about 86.5330155636.

The spelling of 647956 in words is "six hundred forty-seven thousand, nine hundred fifty-six".