12729317 has 2 divisors, whose sum is σ = 12729318. Its totient is φ = 12729316.

The previous prime is 12729293. The next prime is 12729323. The reversal of 12729317 is 71392721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12609601 + 119716 = 3551^2 + 346^2 .

It is a cyclic number.

It is not a de Polignac number, because 12729317 - 2⁶ = 12729253 is a prime.

It is a super-2 number, since 2×12729317² = 324071022572978, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12729217) 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, 6364658 + 6364659.

It is an arithmetic number, because the mean of its divisors is an integer number (6364659).

Almost surely, 2^12729317 is an apocalyptic number.

It is an amenable number.

12729317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12729317 is an equidigital number, since it uses as much as digits as its factorization.

12729317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 12729317 is about 3567.8168394692. The cubic root of 12729317 is about 233.4900441598.

The spelling of 12729317 in words is "twelve million, seven hundred twenty-nine thousand, three hundred seventeen".