2439839 has 2 divisors, whose sum is σ = 2439840. Its totient is φ = 2439838.

The previous prime is 2439803. The next prime is 2439881. The reversal of 2439839 is 9389342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2439839 is a 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 (2439889) 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, 1219919 + 1219920.

It is an arithmetic number, because the mean of its divisors is an integer number (1219920).

2^2439839 is an apocalyptic number.

2439839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2439839 is an equidigital number, since it uses as much as digits as its factorization.

2439839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 2439839 is about 1561.9983994870. The cubic root of 2439839 is about 134.6233488370.

The spelling of 2439839 in words is "two million, four hundred thirty-nine thousand, eight hundred thirty-nine".