129428873 has 16 divisors (see below), whose sum is σ = 151107840. Its totient is φ = 108573696.

The previous prime is 129428863. The next prime is 129428899. The reversal of 129428873 is 378824921.

It is not a de Polignac number, because 129428873 - 2⁴ = 129428857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129428833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63161 + ... + 65177.

It is an arithmetic number, because the mean of its divisors is an integer number (9444240).

Almost surely, 2^129428873 is an apocalyptic number.

It is an amenable number.

129428873 is a deficient number, since it is larger than the sum of its proper divisors (21678967).

129428873 is a wasteful number, since it uses less digits than its factorization.

129428873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216.

The product of its digits is 193536, while the sum is 44.

The square root of 129428873 is about 11376.6811065442. The cubic root of 129428873 is about 505.8367632616.

The spelling of 129428873 in words is "one hundred twenty-nine million, four hundred twenty-eight thousand, eight hundred seventy-three".