404400223 has 2 divisors, whose sum is σ = 404400224. Its totient is φ = 404400222.

The previous prime is 404400211. The next prime is 404400253. The reversal of 404400223 is 322004404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404400223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404400223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404400253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202200111 + 202200112.

It is an arithmetic number, because the mean of its divisors is an integer number (202200112).

Almost surely, 2^404400223 is an apocalyptic number.

404400223 is a deficient number, since it is larger than the sum of its proper divisors (1).

404400223 is an equidigital number, since it uses as much as digits as its factorization.

404400223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 404400223 is about 20109.7046969865. The cubic root of 404400223 is about 739.4982128999.

Adding to 404400223 its reverse (322004404), we get a palindrome (726404627).

The spelling of 404400223 in words is "four hundred four million, four hundred thousand, two hundred twenty-three".