444243421 has 4 divisors (see below), whose sum is σ = 446476000. Its totient is φ = 442010844.

The previous prime is 444243383. The next prime is 444243467. The reversal of 444243421 is 124342444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 444243421 - 2¹¹ = 444241373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444243421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444243491) 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 in 3 ways as a sum of consecutive naturals, for example, 1115991 + ... + 1116388.

It is an arithmetic number, because the mean of its divisors is an integer number (111619000).

Almost surely, 2^444243421 is an apocalyptic number.

It is an amenable number.

444243421 is a deficient number, since it is larger than the sum of its proper divisors (2232579).

444243421 is a wasteful number, since it uses less digits than its factorization.

444243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232578.

The product of its digits is 12288, while the sum is 28.

The square root of 444243421 is about 21077.0828389509. The cubic root of 444243421 is about 763.0277538177.

Adding to 444243421 its reverse (124342444), we get a palindrome (568585865).

The spelling of 444243421 in words is "four hundred forty-four million, two hundred forty-three thousand, four hundred twenty-one".