444052621 has 2 divisors, whose sum is σ = 444052622. Its totient is φ = 444052620.

The previous prime is 444052613. The next prime is 444052657. The reversal of 444052621 is 126250444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441210025 + 2842596 = 21005^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 444052621 - 2³ = 444052613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 444052621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444052681) 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, 222026310 + 222026311.

It is an arithmetic number, because the mean of its divisors is an integer number (222026311).

Almost surely, 2^444052621 is an apocalyptic number.

It is an amenable number.

444052621 is a deficient number, since it is larger than the sum of its proper divisors (1).

444052621 is an equidigital number, since it uses as much as digits as its factorization.

444052621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 444052621 is about 21072.5561097841. The cubic root of 444052621 is about 762.9184994943.

The spelling of 444052621 in words is "four hundred forty-four million, fifty-two thousand, six hundred twenty-one".