129304129 has 2 divisors, whose sum is σ = 129304130. Its totient is φ = 129304128.

The previous prime is 129304111. The next prime is 129304181. The reversal of 129304129 is 921403921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70812225 + 58491904 = 8415^2 + 7648^2 .

It is a cyclic number.

It is not a de Polignac number, because 129304129 - 2⁷ = 129304001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129304129.

It is not a weakly prime, because it can be changed into another prime (129304829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64652064 + 64652065.

It is an arithmetic number, because the mean of its divisors is an integer number (64652065).

Almost surely, 2^129304129 is an apocalyptic number.

It is an amenable number.

129304129 is a deficient number, since it is larger than the sum of its proper divisors (1).

129304129 is an equidigital number, since it uses as much as digits as its factorization.

129304129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 129304129 is about 11371.1973424086. The cubic root of 129304129 is about 505.6742019448.

The spelling of 129304129 in words is "one hundred twenty-nine million, three hundred four thousand, one hundred twenty-nine".