444522989 has 2 divisors, whose sum is σ = 444522990. Its totient is φ = 444522988.

The previous prime is 444522979. The next prime is 444522997. The reversal of 444522989 is 989225444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414733225 + 29789764 = 20365^2 + 5458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444522989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444522959) 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, 222261494 + 222261495.

It is an arithmetic number, because the mean of its divisors is an integer number (222261495).

Almost surely, 2^444522989 is an apocalyptic number.

It is an amenable number.

444522989 is a deficient number, since it is larger than the sum of its proper divisors (1).

444522989 is an equidigital number, since it uses as much as digits as its factorization.

444522989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 47.

The square root of 444522989 is about 21083.7138331936. The cubic root of 444522989 is about 763.1877812566.

The spelling of 444522989 in words is "four hundred forty-four million, five hundred twenty-two thousand, nine hundred eighty-nine".