129163929 has 16 divisors (see below), whose sum is σ = 184566912. Its totient is φ = 80137728.

The previous prime is 129163927. The next prime is 129163961. The reversal of 129163929 is 929361921.

It is not a de Polignac number, because 129163929 - 2¹ = 129163927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129163927) 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, 22744 + ... + 27849.

It is an arithmetic number, because the mean of its divisors is an integer number (11535432).

Almost surely, 2^129163929 is an apocalyptic number.

It is an amenable number.

129163929 is a deficient number, since it is larger than the sum of its proper divisors (55402983).

129163929 is a wasteful number, since it uses less digits than its factorization.

129163929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50656.

The product of its digits is 52488, while the sum is 42.

The square root of 129163929 is about 11365.0309722411. The cubic root of 129163929 is about 505.4913741617.

The spelling of 129163929 in words is "one hundred twenty-nine million, one hundred sixty-three thousand, nine hundred twenty-nine".