404203313 has 4 divisors (see below), whose sum is σ = 408205428. Its totient is φ = 400201200.

The previous prime is 404203291. The next prime is 404203343. The reversal of 404203313 is 313302404.

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 247653169 + 156550144 = 15737^2 + 12512^2 .

It is a cyclic number.

It is not a de Polignac number, because 404203313 - 2⁶ = 404203249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404203343) 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, 2000906 + ... + 2001107.

It is an arithmetic number, because the mean of its divisors is an integer number (102051357).

Almost surely, 2^404203313 is an apocalyptic number.

It is an amenable number.

404203313 is a deficient number, since it is larger than the sum of its proper divisors (4002115).

404203313 is a wasteful number, since it uses less digits than its factorization.

404203313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002114.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 404203313 is about 20104.8082059989. The cubic root of 404203313 is about 739.3781682631.

Adding to 404203313 its reverse (313302404), we get a palindrome (717505717).

Subtracting from 404203313 its reverse (313302404), we obtain a palindrome (90900909).

The spelling of 404203313 in words is "four hundred four million, two hundred three thousand, three hundred thirteen".