679439 has 6 divisors (see below), whose sum is σ = 722064. Its totient is φ = 639200.

The previous prime is 679433. The next prime is 679451. The reversal of 679439 is 934976.

It is not a de Polignac number, because 679439 - 2⁴ = 679423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679433) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 887 + ... + 1464.

It is an arithmetic number, because the mean of its divisors is an integer number (120344).

2⁶⁷⁹⁴³⁹ is an apocalyptic number.

679439 is a deficient number, since it is larger than the sum of its proper divisors (42625).

679439 is a wasteful number, since it uses less digits than its factorization.

679439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385 (or 2368 counting only the distinct ones).

The product of its digits is 40824, while the sum is 38.

The square root of 679439 is about 824.2808987232. The cubic root of 679439 is about 87.9124042267.

The spelling of 679439 in words is "six hundred seventy-nine thousand, four hundred thirty-nine".