2444639 has 2 divisors, whose sum is σ = 2444640. Its totient is φ = 2444638.

The previous prime is 2444621. The next prime is 2444653. The reversal of 2444639 is 9364442.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2444639 - 2⁸ = 2444383 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2444669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222319 + 1222320.

It is an arithmetic number, because the mean of its divisors is an integer number (1222320).

2^2444639 is an apocalyptic number.

2444639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2444639 is an equidigital number, since it uses as much as digits as its factorization.

2444639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 32.

The square root of 2444639 is about 1563.5341377789. The cubic root of 2444639 is about 134.7115744367.

The spelling of 2444639 in words is "two million, four hundred forty-four thousand, six hundred thirty-nine".