404234309 has 4 divisors (see below), whose sum is σ = 404820000. Its totient is φ = 403648620.

The previous prime is 404234261. The next prime is 404234317. The reversal of 404234309 is 903432404.

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 404234309 - 2¹⁶ = 404168773 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 (404234009) 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, 291809 + ... + 293190.

It is an arithmetic number, because the mean of its divisors is an integer number (101205000).

Almost surely, 2^404234309 is an apocalyptic number.

It is an amenable number.

404234309 is a deficient number, since it is larger than the sum of its proper divisors (585691).

404234309 is an equidigital number, since it uses as much as digits as its factorization.

404234309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585690.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 404234309 is about 20105.5790515966. The cubic root of 404234309 is about 739.3970673164.

The spelling of 404234309 in words is "four hundred four million, two hundred thirty-four thousand, three hundred nine".