2744639 has 2 divisors, whose sum is σ = 2744640. Its totient is φ = 2744638.

The previous prime is 2744629. The next prime is 2744689. The reversal of 2744639 is 9364472.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2744639 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2 + 7² + 4⁷ + 4¹⁰ + 6⁸ + 3 + 9 .

It is a junction number, because it is equal to n+sod(n) for n = 2744599 and 2744608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2744629) 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, 1372319 + 1372320.

It is an arithmetic number, because the mean of its divisors is an integer number (1372320).

2^2744639 is an apocalyptic number.

2744639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2744639 is an equidigital number, since it uses as much as digits as its factorization.

2744639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 2744639 is about 1656.6952043149. The cubic root of 2744639 is about 140.0108665035.

It can be divided in two parts, 274463 and 9, that added together give a palindrome (274472).

The spelling of 2744639 in words is "two million, seven hundred forty-four thousand, six hundred thirty-nine".