8040809 has 4 divisors (see below), whose sum is σ = 9189504. Its totient is φ = 6892116.

The previous prime is 8040793. The next prime is 8040817. The reversal of 8040809 is 9080408.

8040809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 8040809 - 2⁴ = 8040793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8040829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574337 + ... + 574350.

It is an arithmetic number, because the mean of its divisors is an integer number (2297376).

Almost surely, 2^8040809 is an apocalyptic number.

It is an amenable number.

8040809 is a deficient number, since it is larger than the sum of its proper divisors (1148695).

8040809 is a wasteful number, since it uses less digits than its factorization.

8040809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148694.

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

The square root of 8040809 is about 2835.6320283140. The cubic root of 8040809 is about 200.3394983782.

The spelling of 8040809 in words is "eight million, forty thousand, eight hundred nine".