404044403989 has 2 divisors, whose sum is σ = 404044403990. Its totient is φ = 404044403988.

The previous prime is 404044403969. The next prime is 404044404007. The reversal of 404044403989 is 989304440404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209267821764 + 194776582225 = 457458^2 + 441335^2 .

It is a cyclic number.

It is not a de Polignac number, because 404044403989 - 2¹⁵ = 404044371221 is a prime.

It is a super-2 number, since 2×404044403989² (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 (404044403969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202022201994 + 202022201995.

It is an arithmetic number, because the mean of its divisors is an integer number (202022201995).

Almost surely, 2^404044403989 is an apocalyptic number.

It is an amenable number.

404044403989 is a deficient number, since it is larger than the sum of its proper divisors (1).

404044403989 is an equidigital number, since it uses as much as digits as its factorization.

404044403989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 49.

The spelling of 404044403989 in words is "four hundred four billion, forty-four million, four hundred three thousand, nine hundred eighty-nine".