679637 has 8 divisors (see below), whose sum is σ = 787200. Its totient is φ = 574704.

The previous prime is 679633. The next prime is 679639. The reversal of 679637 is 736976.

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

It is a cyclic number.

It is not a de Polignac number, because 679637 - 2² = 679633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 679637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679633) 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, 62 + ... + 1167.

It is an arithmetic number, because the mean of its divisors is an integer number (98400).

2⁶⁷⁹⁶³⁷ is an apocalyptic number.

It is an amenable number.

679637 is a deficient number, since it is larger than the sum of its proper divisors (107563).

679637 is a wasteful number, since it uses less digits than its factorization.

679637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315.

The product of its digits is 47628, while the sum is 38.

The square root of 679637 is about 824.4009946622. The cubic root of 679637 is about 87.9209431171.

The spelling of 679637 in words is "six hundred seventy-nine thousand, six hundred thirty-seven".