8004809 has 4 divisors (see below), whose sum is σ = 8013204. Its totient is φ = 7996416.

The previous prime is 8004803. The next prime is 8004817. The reversal of 8004809 is 9084008.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2496400 + 5508409 = 1580^2 + 2347^2 .

It is a cyclic number.

It is not a de Polignac number, because 8004809 - 2¹⁶ = 7939273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8004803) 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, 2552 + ... + 4745.

It is an arithmetic number, because the mean of its divisors is an integer number (2003301).

Almost surely, 2^8004809 is an apocalyptic number.

It is an amenable number.

8004809 is a deficient number, since it is larger than the sum of its proper divisors (8395).

8004809 is a wasteful number, since it uses less digits than its factorization.

8004809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8394.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 8004809 is about 2829.2771161553. The cubic root of 8004809 is about 200.0400669727.

The spelling of 8004809 in words is "eight million, four thousand, eight hundred nine".