979839 has 24 divisors (see below), whose sum is σ = 1644032. Its totient is φ = 550800.

The previous prime is 979831. The next prime is 979873. The reversal of 979839 is 938979.

It is a happy number.

It is not a de Polignac number, because 979839 - 2³ = 979831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 979794 and 979803.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 979839.

It is not an unprimeable number, because it can be changed into a prime (979831) 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, 6414 + ... + 6564.

2⁹⁷⁹⁸³⁹ is an apocalyptic number.

979839 is a deficient number, since it is larger than the sum of its proper divisors (664193).

979839 is a wasteful number, since it uses less digits than its factorization.

979839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 264 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 979839 is about 989.8681730412. The cubic root of 979839 is about 99.3233991036.

The spelling of 979839 in words is "nine hundred seventy-nine thousand, eight hundred thirty-nine".