604909 has 4 divisors (see below), whose sum is σ = 607680. Its totient is φ = 602140.

The previous prime is 604907. The next prime is 604931. The reversal of 604909 is 909406.

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 604909 - 2¹ = 604907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (604907) 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, 1027 + ... + 1504.

It is an arithmetic number, because the mean of its divisors is an integer number (151920).

2⁶⁰⁴⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

604909 is a deficient number, since it is larger than the sum of its proper divisors (2771).

604909 is a wasteful number, since it uses less digits than its factorization.

604909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 604909 is about 777.7589600898. The cubic root of 604909 is about 84.5726648735.

The spelling of 604909 in words is "six hundred four thousand, nine hundred nine".