129043829 has 2 divisors, whose sum is σ = 129043830. Its totient is φ = 129043828.

The previous prime is 129043813. The next prime is 129043841. The reversal of 129043829 is 928340921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84180625 + 44863204 = 9175^2 + 6698^2 .

It is an emirp because it is prime and its reverse (928340921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129043829 - 2⁴ = 129043813 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129043792 and 129043801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129043879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64521914 + 64521915.

It is an arithmetic number, because the mean of its divisors is an integer number (64521915).

Almost surely, 2^129043829 is an apocalyptic number.

It is an amenable number.

129043829 is a deficient number, since it is larger than the sum of its proper divisors (1).

129043829 is an equidigital number, since it uses as much as digits as its factorization.

129043829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 129043829 is about 11359.7459918785. The cubic root of 129043829 is about 505.3346525428.

The spelling of 129043829 in words is "one hundred twenty-nine million, forty-three thousand, eight hundred twenty-nine".