404505313 has 4 divisors (see below), whose sum is σ = 406843668. Its totient is φ = 402166960.

The previous prime is 404505289. The next prime is 404505341. The reversal of 404505313 is 313505404.

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 366645904 + 37859409 = 19148^2 + 6153^2 .

It is a cyclic number.

It is not a de Polignac number, because 404505313 - 2⁵ = 404505281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404505113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168918 + ... + 1169263.

It is an arithmetic number, because the mean of its divisors is an integer number (101710917).

Almost surely, 2^404505313 is an apocalyptic number.

It is an amenable number.

404505313 is a deficient number, since it is larger than the sum of its proper divisors (2338355).

404505313 is a wasteful number, since it uses less digits than its factorization.

404505313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338354.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 404505313 is about 20112.3174447899. The cubic root of 404505313 is about 739.5622642464.

Subtracting from 404505313 its reverse (313505404), we obtain a palindrome (90999909).

The spelling of 404505313 in words is "four hundred four million, five hundred five thousand, three hundred thirteen".