444122989 has 2 divisors, whose sum is σ = 444122990. Its totient is φ = 444122988.

The previous prime is 444122971. The next prime is 444122999. The reversal of 444122989 is 989221444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442765764 + 1357225 = 21042^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 444122989 - 2⁹ = 444122477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444122969) 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, 222061494 + 222061495.

It is an arithmetic number, because the mean of its divisors is an integer number (222061495).

Almost surely, 2^444122989 is an apocalyptic number.

It is an amenable number.

444122989 is a deficient number, since it is larger than the sum of its proper divisors (1).

444122989 is an equidigital number, since it uses as much as digits as its factorization.

444122989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 444122989 is about 21074.2257034511. The cubic root of 444122989 is about 762.9587966805.

The spelling of 444122989 in words is "four hundred forty-four million, one hundred twenty-two thousand, nine hundred eighty-nine".