444021169 has 2 divisors, whose sum is σ = 444021170. Its totient is φ = 444021168.

The previous prime is 444021143. The next prime is 444021239. The reversal of 444021169 is 961120444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384160000 + 59861169 = 19600^2 + 7737^2 .

It is a cyclic number.

It is not a de Polignac number, because 444021169 - 2²⁷ = 309803441 is a prime.

It is a super-2 number, since 2×444021169² = 394309597040253122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 444021169.

It is not a weakly prime, because it can be changed into another prime (444021119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222010584 + 222010585.

It is an arithmetic number, because the mean of its divisors is an integer number (222010585).

Almost surely, 2^444021169 is an apocalyptic number.

It is an amenable number.

444021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

444021169 is an equidigital number, since it uses as much as digits as its factorization.

444021169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 444021169 is about 21071.8098178586. The cubic root of 444021169 is about 762.9004867048.

The spelling of 444021169 in words is "four hundred forty-four million, twenty-one thousand, one hundred sixty-nine".