129955429 has 8 divisors (see below), whose sum is σ = 137771928. Its totient is φ = 122158080.

The previous prime is 129955373. The next prime is 129955447. The reversal of 129955429 is 924559921.

It can be written as a sum of positive squares in 4 ways, for example, as 7344100 + 122611329 = 2710^2 + 11073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129955429 - 2⁹ = 129954917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129953429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10639 + ... + 19315.

It is an arithmetic number, because the mean of its divisors is an integer number (17221491).

Almost surely, 2^129955429 is an apocalyptic number.

It is an amenable number.

129955429 is a deficient number, since it is larger than the sum of its proper divisors (7816499).

129955429 is an equidigital number, since it uses as much as digits as its factorization.

129955429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9575.

The product of its digits is 291600, while the sum is 46.

The square root of 129955429 is about 11399.7995157810. The cubic root of 129955429 is about 506.5218010260.

The spelling of 129955429 in words is "one hundred twenty-nine million, nine hundred fifty-five thousand, four hundred twenty-nine".