404303231989 has 2 divisors, whose sum is σ = 404303231990. Its totient is φ = 404303231988.

The previous prime is 404303231977. The next prime is 404303232017. The reversal of 404303231989 is 989132303404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400730779089 + 3572452900 = 633033^2 + 59770^2 .

It is a cyclic number.

It is not a de Polignac number, because 404303231989 - 2⁷ = 404303231861 is a prime.

It is a super-2 number, since 2×404303231989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404303231929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202151615994 + 202151615995.

It is an arithmetic number, because the mean of its divisors is an integer number (202151615995).

Almost surely, 2^404303231989 is an apocalyptic number.

It is an amenable number.

404303231989 is a deficient number, since it is larger than the sum of its proper divisors (1).

404303231989 is an equidigital number, since it uses as much as digits as its factorization.

404303231989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 404303231989 in words is "four hundred four billion, three hundred three million, two hundred thirty-one thousand, nine hundred eighty-nine".