2604309 has 4 divisors (see below), whose sum is σ = 3472416. Its totient is φ = 1736204.

The previous prime is 2604307. The next prime is 2604347. The reversal of 2604309 is 9034062.

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 2604309 - 2¹ = 2604307 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434049 + ... + 434054.

It is an arithmetic number, because the mean of its divisors is an integer number (868104).

2^2604309 is an apocalyptic number.

It is an amenable number.

2604309 is a deficient number, since it is larger than the sum of its proper divisors (868107).

2604309 is an equidigital number, since it uses as much as digits as its factorization.

2604309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868106.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 2604309 is about 1613.7871606876. The cubic root of 2604309 is about 137.5828085213.

The spelling of 2604309 in words is "two million, six hundred four thousand, three hundred nine".