129188068 has 24 divisors (see below), whose sum is σ = 241001600. Its totient is φ = 60416928.

The previous prime is 129188063. The next prime is 129188093. The reversal of 129188068 is 860881921.

It is not an unprimeable number, because it can be changed into a prime (129188063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755 + ... + 16762.

Almost surely, 2^129188068 is an apocalyptic number.

It is an amenable number.

129188068 is a deficient number, since it is larger than the sum of its proper divisors (111813532).

129188068 is a wasteful number, since it uses less digits than its factorization.

129188068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21619 (or 21617 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 129188068 is about 11366.0929082953. The cubic root of 129188068 is about 505.5228620452.

The spelling of 129188068 in words is "one hundred twenty-nine million, one hundred eighty-eight thousand, sixty-eight".