129829691 has 2 divisors, whose sum is σ = 129829692. Its totient is φ = 129829690.

The previous prime is 129829681. The next prime is 129829727. The reversal of 129829691 is 196928921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129829691 - 2¹⁰ = 129828667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (129829621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64914845 + 64914846.

It is an arithmetic number, because the mean of its divisors is an integer number (64914846).

Almost surely, 2^129829691 is an apocalyptic number.

129829691 is a deficient number, since it is larger than the sum of its proper divisors (1).

129829691 is an equidigital number, since it uses as much as digits as its factorization.

129829691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 47.

The square root of 129829691 is about 11394.2832596000. The cubic root of 129829691 is about 506.3583870759.

The spelling of 129829691 in words is "one hundred twenty-nine million, eight hundred twenty-nine thousand, six hundred ninety-one".