128529929 has 16 divisors (see below), whose sum is σ = 144198144. Its totient is φ = 113568000.

The previous prime is 128529923. The next prime is 128529931. The reversal of 128529929 is 929925821.

It is a cyclic number.

It is not a de Polignac number, because 128529929 - 2²⁰ = 127481353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128529923) 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 15 ways as a sum of consecutive naturals, for example, 64904 + ... + 66854.

It is an arithmetic number, because the mean of its divisors is an integer number (9012384).

Almost surely, 2^128529929 is an apocalyptic number.

It is an amenable number.

128529929 is a deficient number, since it is larger than the sum of its proper divisors (15668215).

128529929 is a wasteful number, since it uses less digits than its factorization.

128529929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128.

The product of its digits is 233280, while the sum is 47.

The square root of 128529929 is about 11337.1040834950. The cubic root of 128529929 is about 504.6629506007.

The spelling of 128529929 in words is "one hundred twenty-eight million, five hundred twenty-nine thousand, nine hundred twenty-nine".