12729973 has 2 divisors, whose sum is σ = 12729974. Its totient is φ = 12729972.

The previous prime is 12729949. The next prime is 12729979. The reversal of 12729973 is 37992721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6589489 + 6140484 = 2567^2 + 2478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12729973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12729979) 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, 6364986 + 6364987.

It is an arithmetic number, because the mean of its divisors is an integer number (6364987).

Almost surely, 2^12729973 is an apocalyptic number.

It is an amenable number.

12729973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12729973 is an equidigital number, since it uses as much as digits as its factorization.

12729973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 12729973 is about 3567.9087712552. The cubic root of 12729973 is about 233.4940550279.

The spelling of 12729973 in words is "twelve million, seven hundred twenty-nine thousand, nine hundred seventy-three".