404813 has 4 divisors (see below), whose sum is σ = 406368. Its totient is φ = 403260.

The previous prime is 404783. The next prime is 404819. The reversal of 404813 is 318404.

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 404813 - 2⁸ = 404557 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404819) 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, 281 + ... + 942.

It is an arithmetic number, because the mean of its divisors is an integer number (101592).

2⁴⁰⁴⁸¹³ is an apocalyptic number.

It is an amenable number.

404813 is a deficient number, since it is larger than the sum of its proper divisors (1555).

404813 is a wasteful number, since it uses less digits than its factorization.

404813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 404813 is about 636.2491650289. The cubic root of 404813 is about 73.9749732754.

The spelling of 404813 in words is "four hundred four thousand, eight hundred thirteen".