129170163 has 4 divisors (see below), whose sum is σ = 172226888. Its totient is φ = 86113440.

The previous prime is 129170141. The next prime is 129170183. The reversal of 129170163 is 361071921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 129170163 - 2⁶ = 129170099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129170163.

It is not an unprimeable number, because it can be changed into a prime (129170183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21528358 + ... + 21528363.

It is an arithmetic number, because the mean of its divisors is an integer number (43056722).

Almost surely, 2^129170163 is an apocalyptic number.

129170163 is a deficient number, since it is larger than the sum of its proper divisors (43056725).

129170163 is an equidigital number, since it uses as much as digits as its factorization.

129170163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43056724.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 129170163 is about 11365.3052312729. The cubic root of 129170163 is about 505.4995064180.

The spelling of 129170163 in words is "one hundred twenty-nine million, one hundred seventy thousand, one hundred sixty-three".