444659221 has 2 divisors, whose sum is σ = 444659222. Its totient is φ = 444659220.

The previous prime is 444659209. The next prime is 444659249. The reversal of 444659221 is 122956444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387656721 + 57002500 = 19689^2 + 7550^2 .

It is a cyclic number.

It is not a de Polignac number, because 444659221 - 2¹¹ = 444657173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444659251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222329610 + 222329611.

It is an arithmetic number, because the mean of its divisors is an integer number (222329611).

Almost surely, 2^444659221 is an apocalyptic number.

It is an amenable number.

444659221 is a deficient number, since it is larger than the sum of its proper divisors (1).

444659221 is an equidigital number, since it uses as much as digits as its factorization.

444659221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 37.

The square root of 444659221 is about 21086.9443258145. The cubic root of 444659221 is about 763.2657374636.

The spelling of 444659221 in words is "four hundred forty-four million, six hundred fifty-nine thousand, two hundred twenty-one".