12729797 has 2 divisors, whose sum is σ = 12729798. Its totient is φ = 12729796.

The previous prime is 12729779. The next prime is 12729817. The reversal of 12729797 is 79792721.

12729797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (12729779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6584356 + 6145441 = 2566^2 + 2479^2 .

It is a cyclic number.

It is not a de Polignac number, because 12729797 - 2¹⁰ = 12728773 is a prime.

It is a super-2 number, since 2×12729797² = 324095463322418, 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 (12729727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6364898 + 6364899.

It is an arithmetic number, because the mean of its divisors is an integer number (6364899).

Almost surely, 2^12729797 is an apocalyptic number.

It is an amenable number.

12729797 is a deficient number, since it is larger than the sum of its proper divisors (1).

12729797 is an equidigital number, since it uses as much as digits as its factorization.

12729797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 111132, while the sum is 44.

The square root of 12729797 is about 3567.8841068622. The cubic root of 12729797 is about 233.4929789549.

The spelling of 12729797 in words is "twelve million, seven hundred twenty-nine thousand, seven hundred ninety-seven".