12929729 has 2 divisors, whose sum is σ = 12929730. Its totient is φ = 12929728.

The previous prime is 12929723. The next prime is 12929753. The reversal of 12929729 is 92792921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12439729 + 490000 = 3527^2 + 700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12929729 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12929723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6464864 + 6464865.

It is an arithmetic number, because the mean of its divisors is an integer number (6464865).

Almost surely, 2^12929729 is an apocalyptic number.

It is an amenable number.

12929729 is a deficient number, since it is larger than the sum of its proper divisors (1).

12929729 is an equidigital number, since it uses as much as digits as its factorization.

12929729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 12929729 is about 3595.7932365474. The cubic root of 12929729 is about 234.7090347898.

The spelling of 12929729 in words is "twelve million, nine hundred twenty-nine thousand, seven hundred twenty-nine".