879939 has 6 divisors (see below), whose sum is σ = 1271036. Its totient is φ = 586620.

The previous prime is 879919. The next prime is 879941. The reversal of 879939 is 939978.

It is a happy number.

It is not a de Polignac number, because 879939 - 2¹⁶ = 814403 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 879894 and 879903.

It is not an unprimeable number, because it can be changed into a prime (879919) 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, 48877 + ... + 48894.

2⁸⁷⁹⁹³⁹ is an apocalyptic number.

879939 is a deficient number, since it is larger than the sum of its proper divisors (391097).

879939 is a wasteful number, since it uses less digits than its factorization.

879939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97777 (or 97774 counting only the distinct ones).

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

The square root of 879939 is about 938.0506382920. The cubic root of 879939 is about 95.8261828733.

The spelling of 879939 in words is "eight hundred seventy-nine thousand, nine hundred thirty-nine".