2008009 has 4 divisors (see below), whose sum is σ = 2022804. Its totient is φ = 1993216.

The previous prime is 2008003. The next prime is 2008033. The reversal of 2008009 is 9008002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1729225 + 278784 = 1315^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 2008009 - 2⁷ = 2007881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2008003) 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, 7192 + ... + 7465.

It is an arithmetic number, because the mean of its divisors is an integer number (505701).

2^2008009 is an apocalyptic number.

It is an amenable number.

2008009 is a deficient number, since it is larger than the sum of its proper divisors (14795).

2008009 is a wasteful number, since it uses less digits than its factorization.

2008009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14794.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 2008009 is about 1417.0423423455. The cubic root of 2008009 is about 126.1600594588.

The spelling of 2008009 in words is "two million, eight thousand, nine".