129168529 has 16 divisors (see below), whose sum is σ = 154725120. Its totient is φ = 105431040.

The previous prime is 129168511. The next prime is 129168553. The reversal of 129168529 is 925861921.

It is a cyclic number.

It is not a de Polignac number, because 129168529 - 2⁵ = 129168497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129168509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37137 + ... + 40465.

It is an arithmetic number, because the mean of its divisors is an integer number (9670320).

Almost surely, 2^129168529 is an apocalyptic number.

It is an amenable number.

129168529 is a deficient number, since it is larger than the sum of its proper divisors (25556591).

129168529 is a wasteful number, since it uses less digits than its factorization.

129168529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600.

The product of its digits is 77760, while the sum is 43.

The square root of 129168529 is about 11365.2333456027. The cubic root of 129168529 is about 505.4973748895.

The spelling of 129168529 in words is "one hundred twenty-nine million, one hundred sixty-eight thousand, five hundred twenty-nine".