129899201 has 2 divisors, whose sum is σ = 129899202. Its totient is φ = 129899200.

The previous prime is 129899191. The next prime is 129899213. The reversal of 129899201 is 102998921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94556176 + 35343025 = 9724^2 + 5945^2 .

It is an emirp because it is prime and its reverse (102998921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129899201 - 2⁶ = 129899137 is a prime.

It is not a weakly prime, because it can be changed into another prime (129899251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64949600 + 64949601.

It is an arithmetic number, because the mean of its divisors is an integer number (64949601).

Almost surely, 2^129899201 is an apocalyptic number.

It is an amenable number.

129899201 is a deficient number, since it is larger than the sum of its proper divisors (1).

129899201 is an equidigital number, since it uses as much as digits as its factorization.

129899201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 129899201 is about 11397.3330652394. Note that the first 3 decimals coincide. The cubic root of 129899201 is about 506.4487379853.

The spelling of 129899201 in words is "one hundred twenty-nine million, eight hundred ninety-nine thousand, two hundred one".