804979 has 4 divisors (see below), whose sum is σ = 919984. Its totient is φ = 689976.

The previous prime is 804943. The next prime is 804983. The reversal of 804979 is 979408.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-804979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57492 + ... + 57505.

It is an arithmetic number, because the mean of its divisors is an integer number (229996).

2⁸⁰⁴⁹⁷⁹ is an apocalyptic number.

804979 is a deficient number, since it is larger than the sum of its proper divisors (115005).

804979 is a wasteful number, since it uses less digits than its factorization.

804979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115004.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 804979 is about 897.2062193275. The cubic root of 804979 is about 93.0239657664.

It can be divided in two parts, 8049 and 79, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 804979 in words is "eight hundred four thousand, nine hundred seventy-nine".