679656 has 16 divisors (see below), whose sum is σ = 1699200. Its totient is φ = 226544.

The previous prime is 679639. The next prime is 679669. The reversal of 679656 is 656976.

It is a happy number.

It is an unprimeable number.

679656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14136 + ... + 14183.

It is an arithmetic number, because the mean of its divisors is an integer number (106200).

2⁶⁷⁹⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

679656 is an abundant number, since it is smaller than the sum of its proper divisors (1019544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679656 is a wasteful number, since it uses less digits than its factorization.

679656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28328 (or 28324 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 679656 is about 824.4125181000. The cubic root of 679656 is about 87.9217624184.

The spelling of 679656 in words is "six hundred seventy-nine thousand, six hundred fifty-six".