444442189 has 2 divisors, whose sum is σ = 444442190. Its totient is φ = 444442188.

The previous prime is 444442183. The next prime is 444442213. The reversal of 444442189 is 981244444.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387696100 + 56746089 = 19690^2 + 7533^2 .

It is a cyclic number.

It is not a de Polignac number, because 444442189 - 2²⁷ = 310224461 is a prime.

It is a super-2 number, since 2×444442189² = 395057718726223442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444442183) 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, 222221094 + 222221095.

It is an arithmetic number, because the mean of its divisors is an integer number (222221095).

Almost surely, 2^444442189 is an apocalyptic number.

It is an amenable number.

444442189 is a deficient number, since it is larger than the sum of its proper divisors (1).

444442189 is an equidigital number, since it uses as much as digits as its factorization.

444442189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 40.

The square root of 444442189 is about 21081.7975751595. The cubic root of 444442189 is about 763.1415374470.

The spelling of 444442189 in words is "four hundred forty-four million, four hundred forty-two thousand, one hundred eighty-nine".