2393809 has 4 divisors (see below), whose sum is σ = 2611440. Its totient is φ = 2176180.

The previous prime is 2393773. The next prime is 2393819. The reversal of 2393809 is 9083932.

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 2393809 - 2¹⁵ = 2361041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2393819) 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, 108799 + ... + 108820.

It is an arithmetic number, because the mean of its divisors is an integer number (652860).

2^2393809 is an apocalyptic number.

It is an amenable number.

2393809 is a deficient number, since it is larger than the sum of its proper divisors (217631).

2393809 is a wasteful number, since it uses less digits than its factorization.

2393809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217630.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 2393809 is about 1547.1939115702. The cubic root of 2393809 is about 133.7713670117.

The spelling of 2393809 in words is "two million, three hundred ninety-three thousand, eight hundred nine".