12739439 has 8 divisors (see below), whose sum is σ = 13235520. Its totient is φ = 12247200.

The previous prime is 12739429. The next prime is 12739471. The reversal of 12739439 is 93493721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12739439 - 2⁸ = 12739183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739429) 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 in 7 ways as a sum of consecutive naturals, for example, 7049 + ... + 8669.

It is an arithmetic number, because the mean of its divisors is an integer number (1654440).

Almost surely, 2^12739439 is an apocalyptic number.

12739439 is a deficient number, since it is larger than the sum of its proper divisors (496081).

12739439 is a wasteful number, since it uses less digits than its factorization.

12739439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921.

The product of its digits is 40824, while the sum is 38.

The square root of 12739439 is about 3569.2350721128. The cubic root of 12739439 is about 233.5519160332.

The spelling of 12739439 in words is "twelve million, seven hundred thirty-nine thousand, four hundred thirty-nine".