404403943 has 4 divisors (see below), whose sum is σ = 407491128. Its totient is φ = 401316760.

The previous prime is 404403931. The next prime is 404403977. The reversal of 404403943 is 349304404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404403943 - 2⁵ = 404403911 is a prime.

It is a super-2 number, since 2×404403943² = 327085098227894498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404403913) 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, 1543396 + ... + 1543657.

It is an arithmetic number, because the mean of its divisors is an integer number (101872782).

Almost surely, 2^404403943 is an apocalyptic number.

404403943 is a deficient number, since it is larger than the sum of its proper divisors (3087185).

404403943 is a wasteful number, since it uses less digits than its factorization.

404403943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087184.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 404403943 is about 20109.7971894298. The cubic root of 404403943 is about 739.5004803936.

The spelling of 404403943 in words is "four hundred four million, four hundred three thousand, nine hundred forty-three".