679679 has 24 divisors (see below), whose sum is σ = 938448. Its totient is φ = 483840.

The previous prime is 679669. The next prime is 679681. The reversal of 679679 is 976976.

It is not a de Polignac number, because 679679 - 2⁸ = 679423 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6959 + ... + 7055.

It is an arithmetic number, because the mean of its divisors is an integer number (39102).

2⁶⁷⁹⁶⁷⁹ is an apocalyptic number.

679679 is a deficient number, since it is larger than the sum of its proper divisors (258769).

679679 is a wasteful number, since it uses less digits than its factorization.

679679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 128 counting only the distinct ones).

The product of its digits is 142884, while the sum is 44.

The square root of 679679 is about 824.4264673092. The cubic root of 679679 is about 87.9227541837.

It can be divided in two parts, 67967 and 9, that added together give a palindrome (67976).

The spelling of 679679 in words is "six hundred seventy-nine thousand, six hundred seventy-nine".