2904009 has 4 divisors (see below), whose sum is σ = 3872016. Its totient is φ = 1936004.

The previous prime is 2904001. The next prime is 2904047. The reversal of 2904009 is 9004092.

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 2904009 - 2³ = 2904001 is a prime.

It is a D-number.

2904009 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2904009.

It is not an unprimeable number, because it can be changed into a prime (2904001) 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, 483999 + ... + 484004.

It is an arithmetic number, because the mean of its divisors is an integer number (968004).

2^2904009 is an apocalyptic number.

It is an amenable number.

2904009 is a deficient number, since it is larger than the sum of its proper divisors (968007).

2904009 is an equidigital number, since it uses as much as digits as its factorization.

2904009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968006.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2904009 is about 1704.1153129997. The cubic root of 2904009 is about 142.6699971806.

The spelling of 2904009 in words is "two million, nine hundred four thousand, nine".