129010729 has 2 divisors, whose sum is σ = 129010730. Its totient is φ = 129010728.

The previous prime is 129010699. The next prime is 129010781. The reversal of 129010729 is 927010921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 54361129 = 8640^2 + 7373^2 .

It is an emirp because it is prime and its reverse (927010921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129010729 - 2⁵ = 129010697 is a prime.

It is a super-2 number, since 2×129010729² = 33287536394222882, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 129010729.

It is not a weakly prime, because it can be changed into another prime (129010129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64505364 + 64505365.

It is an arithmetic number, because the mean of its divisors is an integer number (64505365).

Almost surely, 2^129010729 is an apocalyptic number.

It is an amenable number.

129010729 is a deficient number, since it is larger than the sum of its proper divisors (1).

129010729 is an equidigital number, since it uses as much as digits as its factorization.

129010729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 129010729 is about 11358.2889996689. The cubic root of 129010729 is about 505.2914423987.

The spelling of 129010729 in words is "one hundred twenty-nine million, ten thousand, seven hundred twenty-nine".