444477221 has 2 divisors, whose sum is σ = 444477222. Its totient is φ = 444477220.

The previous prime is 444477199. The next prime is 444477289. The reversal of 444477221 is 122774444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255552196 + 188925025 = 15986^2 + 13745^2 .

It is a cyclic number.

It is not a de Polignac number, because 444477221 - 2²⁶ = 377368357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444477421) 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, 222238610 + 222238611.

It is an arithmetic number, because the mean of its divisors is an integer number (222238611).

Almost surely, 2^444477221 is an apocalyptic number.

It is an amenable number.

444477221 is a deficient number, since it is larger than the sum of its proper divisors (1).

444477221 is an equidigital number, since it uses as much as digits as its factorization.

444477221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176, while the sum is 35.

The square root of 444477221 is about 21082.6284177282. The cubic root of 444477221 is about 763.1615878027.

The spelling of 444477221 in words is "four hundred forty-four million, four hundred seventy-seven thousand, two hundred twenty-one".