2404909 has 4 divisors (see below), whose sum is σ = 2589916. Its totient is φ = 2219904.

The previous prime is 2404907. The next prime is 2404931. The reversal of 2404909 is 9094042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 675684 + 1729225 = 822^2 + 1315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2404909 - 2¹ = 2404907 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 (2404907) 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, 92484 + ... + 92509.

It is an arithmetic number, because the mean of its divisors is an integer number (647479).

2^2404909 is an apocalyptic number.

It is an amenable number.

2404909 is a deficient number, since it is larger than the sum of its proper divisors (185007).

2404909 is a wasteful number, since it uses less digits than its factorization.

2404909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185006.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2404909 is about 1550.7769020720. The cubic root of 2404909 is about 133.9778124696.

The spelling of 2404909 in words is "two million, four hundred four thousand, nine hundred nine".