444427521 has 4 divisors (see below), whose sum is σ = 592570032. Its totient is φ = 296285012.

The previous prime is 444427513. The next prime is 444427541. The reversal of 444427521 is 125724444.

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 444427521 - 2³ = 444427513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (444427541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74071251 + ... + 74071256.

It is an arithmetic number, because the mean of its divisors is an integer number (148142508).

Almost surely, 2^444427521 is an apocalyptic number.

It is an amenable number.

444427521 is a deficient number, since it is larger than the sum of its proper divisors (148142511).

444427521 is a wasteful number, since it uses less digits than its factorization.

444427521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148142510.

The product of its digits is 35840, while the sum is 33.

The square root of 444427521 is about 21081.4496892410. The cubic root of 444427521 is about 763.1331419920.

The spelling of 444427521 in words is "four hundred forty-four million, four hundred twenty-seven thousand, five hundred twenty-one".