679839 has 8 divisors (see below), whose sum is σ = 954240. Its totient is φ = 429336.

The previous prime is 679837. The next prime is 679843. The reversal of 679839 is 938976.

It is a happy number.

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

It is not a de Polignac number, because 679839 - 2¹ = 679837 is a prime.

679839 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 679839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679837) 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, 5907 + ... + 6020.

It is an arithmetic number, because the mean of its divisors is an integer number (119280).

2⁶⁷⁹⁸³⁹ is an apocalyptic number.

679839 is a deficient number, since it is larger than the sum of its proper divisors (274401).

679839 is a wasteful number, since it uses less digits than its factorization.

679839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11949.

The product of its digits is 81648, while the sum is 42.

The square root of 679839 is about 824.5234987555. The cubic root of 679839 is about 87.9296528015.

The spelling of 679839 in words is "six hundred seventy-nine thousand, eight hundred thirty-nine".