679646 has 8 divisors (see below), whose sum is σ = 1112184. Its totient is φ = 308920.

The previous prime is 679639. The next prime is 679669. The reversal of 679646 is 646976.

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

It is a congruent number.

It is an unprimeable number.

679646 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15425 + ... + 15468.

It is an arithmetic number, because the mean of its divisors is an integer number (139023).

2⁶⁷⁹⁶⁴⁶ is an apocalyptic number.

679646 is a deficient number, since it is larger than the sum of its proper divisors (432538).

679646 is a wasteful number, since it uses less digits than its factorization.

679646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30906.

The product of its digits is 54432, while the sum is 38.

The square root of 679646 is about 824.4064531528. The cubic root of 679646 is about 87.9213312091.

The spelling of 679646 in words is "six hundred seventy-nine thousand, six hundred forty-six".