404403947 has 4 divisors (see below), whose sum is σ = 404445360. Its totient is φ = 404362536.

The previous prime is 404403931. The next prime is 404403977. The reversal of 404403947 is 749304404.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 404403947 - 2⁴ = 404403931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404403907) 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, 2954 + ... + 28592.

It is an arithmetic number, because the mean of its divisors is an integer number (101111340).

Almost surely, 2^404403947 is an apocalyptic number.

404403947 is a deficient number, since it is larger than the sum of its proper divisors (41413).

404403947 is a wasteful number, since it uses less digits than its factorization.

404403947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41412.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 404403947 is about 20109.7972888838. The cubic root of 404403947 is about 739.5004828318.

The spelling of 404403947 in words is "four hundred four million, four hundred three thousand, nine hundred forty-seven".