129686188 has 12 divisors (see below), whose sum is σ = 228310992. Its totient is φ = 64454480.

The previous prime is 129686171. The next prime is 129686203. The reversal of 129686188 is 881686921.

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 3 ways as a sum of consecutive naturals, for example, 96403 + ... + 97738.

It is an arithmetic number, because the mean of its divisors is an integer number (19025916).

Almost surely, 2^129686188 is an apocalyptic number.

It is an amenable number.

129686188 is a deficient number, since it is larger than the sum of its proper divisors (98624804).

129686188 is a wasteful number, since it uses less digits than its factorization.

129686188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194312 (or 194310 counting only the distinct ones).

The product of its digits is 331776, while the sum is 49.

The square root of 129686188 is about 11387.9843695010. The cubic root of 129686188 is about 506.1717560730.

The spelling of 129686188 in words is "one hundred twenty-nine million, six hundred eighty-six thousand, one hundred eighty-eight".