12739717 has 2 divisors, whose sum is σ = 12739718. Its totient is φ = 12739716.

The previous prime is 12739711. The next prime is 12739721. The reversal of 12739717 is 71793721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6584356 + 6155361 = 2566^2 + 2481^2 .

It is a cyclic number.

It is not a de Polignac number, because 12739717 - 2⁷ = 12739589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12739711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6369858 + 6369859.

It is an arithmetic number, because the mean of its divisors is an integer number (6369859).

Almost surely, 2^12739717 is an apocalyptic number.

It is an amenable number.

12739717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12739717 is an equidigital number, since it uses as much as digits as its factorization.

12739717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18522, while the sum is 37.

The square root of 12739717 is about 3569.2740158189. The cubic root of 12739717 is about 233.5536148772.

It can be divided in two parts, 12739 and 717, that added together give a square (13456 = 116²).

The spelling of 12739717 in words is "twelve million, seven hundred thirty-nine thousand, seven hundred seventeen".