129828129 has 8 divisors (see below), whose sum is σ = 174722400. Its totient is φ = 85742976.

The previous prime is 129828119. The next prime is 129828173. The reversal of 129828129 is 921828921.

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

It is not a de Polignac number, because 129828129 - 2⁴ = 129828113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129828119) 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 in 7 ways as a sum of consecutive naturals, for example, 201904 + ... + 202545.

It is an arithmetic number, because the mean of its divisors is an integer number (21840300).

Almost surely, 2^129828129 is an apocalyptic number.

It is an amenable number.

129828129 is a deficient number, since it is larger than the sum of its proper divisors (44894271).

129828129 is a wasteful number, since it uses less digits than its factorization.

129828129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404559.

The product of its digits is 41472, while the sum is 42.

The square root of 129828129 is about 11394.2147162496. The cubic root of 129828129 is about 506.3563563771.

The spelling of 129828129 in words is "one hundred twenty-nine million, eight hundred twenty-eight thousand, one hundred twenty-nine".