2738639 has 2 divisors, whose sum is σ = 2738640. Its totient is φ = 2738638.

The previous prime is 2738623. The next prime is 2738647. The reversal of 2738639 is 9368372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2738639 - 2⁴ = 2738623 is a prime.

It is a super-3 number, since 3×2738639³ = 61620557078272833357, which contains 333 as substring.

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 (2738039) 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, 1369319 + 1369320.

It is an arithmetic number, because the mean of its divisors is an integer number (1369320).

2^2738639 is an apocalyptic number.

2738639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2738639 is an equidigital number, since it uses as much as digits as its factorization.

2738639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 2738639 is about 1654.8833795769. The cubic root of 2738639 is about 139.9087670904.

The spelling of 2738639 in words is "two million, seven hundred thirty-eight thousand, six hundred thirty-nine".