804534809 has 20 divisors (see below), whose sum is σ = 923403204. Its totient is φ = 698540544.

The previous prime is 804534799. The next prime is 804534811. The reversal of 804534809 is 908435408.

It can be written as a sum of positive squares in 10 ways, for example, as 801739225 + 2795584 = 28315^2 + 1672^2 .

It is not a de Polignac number, because 804534809 - 2⁸ = 804534553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804534839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 484709 + ... + 486365.

Almost surely, 2^804534809 is an apocalyptic number.

It is an amenable number.

804534809 is a deficient number, since it is larger than the sum of its proper divisors (118868395).

804534809 is an equidigital number, since it uses as much as digits as its factorization.

804534809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 804534809 is about 28364.3228193447. The cubic root of 804534809 is about 930.0685227192.

The spelling of 804534809 in words is "eight hundred four million, five hundred thirty-four thousand, eight hundred nine".