129516029 has 2 divisors, whose sum is σ = 129516030. Its totient is φ = 129516028.

The previous prime is 129516017. The next prime is 129516031. The reversal of 129516029 is 920615921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123765625 + 5750404 = 11125^2 + 2398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129516029 is a prime.

Together with 129516031, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129516029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129516229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64758014 + 64758015.

It is an arithmetic number, because the mean of its divisors is an integer number (64758015).

Almost surely, 2^129516029 is an apocalyptic number.

It is an amenable number.

129516029 is a deficient number, since it is larger than the sum of its proper divisors (1).

129516029 is an equidigital number, since it uses as much as digits as its factorization.

129516029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 129516029 is about 11380.5109287764. The cubic root of 129516029 is about 505.9502794495.

The spelling of 129516029 in words is "one hundred twenty-nine million, five hundred sixteen thousand, twenty-nine".