129050729 has 2 divisors, whose sum is σ = 129050730. Its totient is φ = 129050728.

The previous prime is 129050693. The next prime is 129050741. The reversal of 129050729 is 927050921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123654400 + 5396329 = 11120^2 + 2323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129050729 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (129050429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64525364 + 64525365.

It is an arithmetic number, because the mean of its divisors is an integer number (64525365).

Almost surely, 2^129050729 is an apocalyptic number.

It is an amenable number.

129050729 is a deficient number, since it is larger than the sum of its proper divisors (1).

129050729 is an equidigital number, since it uses as much as digits as its factorization.

129050729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 129050729 is about 11360.0496917927. The cubic root of 129050729 is about 505.3436591647.

The spelling of 129050729 in words is "one hundred twenty-nine million, fifty thousand, seven hundred twenty-nine".