4444001321 has 4 divisors (see below), whose sum is σ = 4447618500. Its totient is φ = 4440384144.

The previous prime is 4444001279. The next prime is 4444001323. The reversal of 4444001321 is 1231004444.

It is a happy number.

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 2869102096 + 1574899225 = 53564^2 + 39685^2 .

It is a cyclic number.

It is not a de Polignac number, because 4444001321 - 2²² = 4439807017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4444001323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806746 + ... + 1809203.

It is an arithmetic number, because the mean of its divisors is an integer number (1111904625).

Almost surely, 2^4444001321 is an apocalyptic number.

It is an amenable number.

4444001321 is a deficient number, since it is larger than the sum of its proper divisors (3617179).

4444001321 is a wasteful number, since it uses less digits than its factorization.

4444001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617178.

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

The square root of 4444001321 is about 66663.3431579905. The cubic root of 4444001321 is about 1644.0867392514.

Adding to 4444001321 its reverse (1231004444), we get a palindrome (5675005765).

The spelling of 4444001321 in words is "four billion, four hundred forty-four million, one thousand, three hundred twenty-one".