4444639 has 2 divisors, whose sum is σ = 4444640. Its totient is φ = 4444638.

The previous prime is 4444621. The next prime is 4444663. The reversal of 4444639 is 9364444.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4444639 - 2⁵ = 4444607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4444669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2222319 + 2222320.

It is an arithmetic number, because the mean of its divisors is an integer number (2222320).

Almost surely, 2^4444639 is an apocalyptic number.

4444639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4444639 is an equidigital number, since it uses as much as digits as its factorization.

4444639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 34.

The square root of 4444639 is about 2108.2312491755. The cubic root of 4444639 is about 164.4165373300.

The spelling of 4444639 in words is "four million, four hundred forty-four thousand, six hundred thirty-nine".