404311403 has 4 divisors (see below), whose sum is σ = 404730480. Its totient is φ = 403892328.

The previous prime is 404311387. The next prime is 404311421. The reversal of 404311403 is 304113404.

It is a happy number.

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 404311403 - 2⁴ = 404311387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404311463) 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, 208088 + ... + 210021.

It is an arithmetic number, because the mean of its divisors is an integer number (101182620).

Almost surely, 2^404311403 is an apocalyptic number.

404311403 is a deficient number, since it is larger than the sum of its proper divisors (419077).

404311403 is an equidigital number, since it uses as much as digits as its factorization.

404311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419076.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 404311403 is about 20107.4961892325. The cubic root of 404311403 is about 739.4440693091. Note that the first 3 decimals are identical.

Adding to 404311403 its reverse (304113404), we get a palindrome (708424807).

The spelling of 404311403 in words is "four hundred four million, three hundred eleven thousand, four hundred three".