3604009 has 4 divisors (see below), whose sum is σ = 3608704. Its totient is φ = 3599316.

The previous prime is 3603991. The next prime is 3604019. The reversal of 3604009 is 9004063.

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 3604009 - 2¹⁹ = 3079721 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3604019) 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, 897 + ... + 2830.

It is an arithmetic number, because the mean of its divisors is an integer number (902176).

Almost surely, 2^3604009 is an apocalyptic number.

It is an amenable number.

3604009 is a deficient number, since it is larger than the sum of its proper divisors (4695).

3604009 is an equidigital number, since it uses as much as digits as its factorization.

3604009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 3604009 is about 1898.4227664037. The cubic root of 3604009 is about 153.3187567534.

The spelling of 3604009 in words is "three million, six hundred four thousand, nine".