444244403989 has 2 divisors, whose sum is σ = 444244403990. Its totient is φ = 444244403988.

The previous prime is 444244403963. The next prime is 444244404029. The reversal of 444244403989 is 989304442444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288736424964 + 155507979025 = 537342^2 + 394345^2 .

It is a cyclic number.

It is not a de Polignac number, because 444244403989 - 2²⁵ = 444210849557 is a prime.

It is a super-2 number, since 2×444244403989² (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 (444244403929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222122201994 + 222122201995.

It is an arithmetic number, because the mean of its divisors is an integer number (222122201995).

Almost surely, 2^444244403989 is an apocalyptic number.

It is an amenable number.

444244403989 is a deficient number, since it is larger than the sum of its proper divisors (1).

444244403989 is an equidigital number, since it uses as much as digits as its factorization.

444244403989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15925248, while the sum is 55.

The spelling of 444244403989 in words is "four hundred forty-four billion, two hundred forty-four million, four hundred three thousand, nine hundred eighty-nine".