809079 has 12 divisors (see below), whose sum is σ = 1114344. Its totient is φ = 522144.

The previous prime is 809063. The next prime is 809087. The reversal of 809079 is 970908.

It is not a de Polignac number, because 809079 - 2⁴ = 809063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809579) 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 11 ways as a sum of consecutive naturals, for example, 4009 + ... + 4205.

It is an arithmetic number, because the mean of its divisors is an integer number (92862).

2⁸⁰⁹⁰⁷⁹ is an apocalyptic number.

809079 is a deficient number, since it is larger than the sum of its proper divisors (305265).

809079 is a wasteful number, since it uses less digits than its factorization.

809079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 809079 is about 899.4881878046. The cubic root of 809079 is about 93.1816313951.

The spelling of 809079 in words is "eight hundred nine thousand, seventy-nine".