804117809 has 4 divisors (see below), whose sum is σ = 877219440. Its totient is φ = 731016180.

The previous prime is 804117803. The next prime is 804117817. The reversal of 804117809 is 908711408.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 804117809 - 2²⁰ = 803069233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804117803) 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, 36550799 + ... + 36550820.

It is an arithmetic number, because the mean of its divisors is an integer number (219304860).

Almost surely, 2^804117809 is an apocalyptic number.

It is an amenable number.

804117809 is a deficient number, since it is larger than the sum of its proper divisors (73101631).

804117809 is a wasteful number, since it uses less digits than its factorization.

804117809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73101630.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 804117809 is about 28356.9710829630. The cubic root of 804117809 is about 929.9078064080.

The spelling of 804117809 in words is "eight hundred four million, one hundred seventeen thousand, eight hundred nine".