4004609 has 4 divisors (see below), whose sum is σ = 4576704. Its totient is φ = 3432516.

The previous prime is 4004597. The next prime is 4004617. The reversal of 4004609 is 9064004.

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 4004609 - 2²⁰ = 2956033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4004629) 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, 286037 + ... + 286050.

It is an arithmetic number, because the mean of its divisors is an integer number (1144176).

Almost surely, 2^4004609 is an apocalyptic number.

It is an amenable number.

4004609 is a deficient number, since it is larger than the sum of its proper divisors (572095).

4004609 is an equidigital number, since it uses as much as digits as its factorization.

4004609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572094.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 4004609 is about 2001.1519182711. The cubic root of 4004609 is about 158.8010512232.

The spelling of 4004609 in words is "four million, four thousand, six hundred nine".