3605609 has 4 divisors (see below), whose sum is σ = 4120704. Its totient is φ = 3090516.

The previous prime is 3605561. The next prime is 3605617. The reversal of 3605609 is 9065063.

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 a de Polignac number, because none of the positive numbers 2^k-3605609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3605629) 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, 257537 + ... + 257550.

It is an arithmetic number, because the mean of its divisors is an integer number (1030176).

Almost surely, 2^3605609 is an apocalyptic number.

It is an amenable number.

3605609 is a deficient number, since it is larger than the sum of its proper divisors (515095).

3605609 is an equidigital number, since it uses as much as digits as its factorization.

3605609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515094.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 3605609 is about 1898.8441220911. The cubic root of 3605609 is about 153.3414420202.

The spelling of 3605609 in words is "three million, six hundred five thousand, six hundred nine".