444223121 has 4 divisors (see below), whose sum is σ = 446129892. Its totient is φ = 442316352.

The previous prime is 444223111. The next prime is 444223159. The reversal of 444223121 is 121322444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 272613121 + 171610000 = 16511^2 + 13100^2 .

It is a cyclic number.

It is not a de Polignac number, because 444223121 - 2²² = 440028817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444223111) 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, 953036 + ... + 953501.

It is an arithmetic number, because the mean of its divisors is an integer number (111532473).

Almost surely, 2^444223121 is an apocalyptic number.

It is an amenable number.

444223121 is a deficient number, since it is larger than the sum of its proper divisors (1906771).

444223121 is a wasteful number, since it uses less digits than its factorization.

444223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906770.

The product of its digits is 1536, while the sum is 23.

The square root of 444223121 is about 21076.6012677566. The cubic root of 444223121 is about 763.0161312863.

Adding to 444223121 its reverse (121322444), we get a palindrome (565545565).

The spelling of 444223121 in words is "four hundred forty-four million, two hundred twenty-three thousand, one hundred twenty-one".