12739429 has 2 divisors, whose sum is σ = 12739430. Its totient is φ = 12739428.

The previous prime is 12739403. The next prime is 12739471. The reversal of 12739429 is 92493721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10227204 + 2512225 = 3198^2 + 1585^2 .

It is an emirp because it is prime and its reverse (92493721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12739429 - 2¹³ = 12731237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12739229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6369714 + 6369715.

It is an arithmetic number, because the mean of its divisors is an integer number (6369715).

Almost surely, 2^12739429 is an apocalyptic number.

It is an amenable number.

12739429 is a deficient number, since it is larger than the sum of its proper divisors (1).

12739429 is an equidigital number, since it uses as much as digits as its factorization.

12739429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 12739429 is about 3569.2336712521. The cubic root of 12739429 is about 233.5518549232.

The spelling of 12739429 in words is "twelve million, seven hundred thirty-nine thousand, four hundred twenty-nine".