129118194 has 12 divisors (see below), whose sum is σ = 279756126. Its totient is φ = 43039392.

The previous prime is 129118189. The next prime is 129118201. The reversal of 129118194 is 491811921.

It can be written as a sum of positive squares in only one way, i.e., 127983969 + 1134225 = 11313^2 + 1065^2 .

It is a Curzon number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3586599 + ... + 3586634.

Almost surely, 2^129118194 is an apocalyptic number.

129118194 is an abundant number, since it is smaller than the sum of its proper divisors (150637932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129118194 is a wasteful number, since it uses less digits than its factorization.

129118194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7173241 (or 7173238 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 129118194 is about 11363.0187010319. The cubic root of 129118194 is about 505.4317048269.

The spelling of 129118194 in words is "one hundred twenty-nine million, one hundred eighteen thousand, one hundred ninety-four".