804779 has 4 divisors (see below), whose sum is σ = 832560. Its totient is φ = 777000.

The previous prime is 804767. The next prime is 804803. The reversal of 804779 is 977408.

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

It is a cyclic number.

It is not a de Polignac number, because 804779 - 2⁸ = 804523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804709) 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 3 ways as a sum of consecutive naturals, for example, 13847 + ... + 13904.

It is an arithmetic number, because the mean of its divisors is an integer number (208140).

2⁸⁰⁴⁷⁷⁹ is an apocalyptic number.

804779 is a deficient number, since it is larger than the sum of its proper divisors (27781).

804779 is a wasteful number, since it uses less digits than its factorization.

804779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27780.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 804779 is about 897.0947553074. The cubic root of 804779 is about 93.0162610792.

The spelling of 804779 in words is "eight hundred four thousand, seven hundred seventy-nine".