13229729 has 2 divisors, whose sum is σ = 13229730. Its totient is φ = 13229728.

The previous prime is 13229707. The next prime is 13229737. The reversal of 13229729 is 92792231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 1567504 = 3415^2 + 1252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13229729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13229759) 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, 6614864 + 6614865.

It is an arithmetic number, because the mean of its divisors is an integer number (6614865).

Almost surely, 2^13229729 is an apocalyptic number.

It is an amenable number.

13229729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13229729 is an equidigital number, since it uses as much as digits as its factorization.

13229729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 13229729 is about 3637.2694428651. The cubic root of 13229729 is about 236.5104399976.

The spelling of 13229729 in words is "thirteen million, two hundred twenty-nine thousand, seven hundred twenty-nine".