129129368 has 16 divisors (see below), whose sum is σ = 245732280. Its totient is φ = 63600768.

The previous prime is 129129361. The next prime is 129129379. The reversal of 129129368 is 863921921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129129361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119921 + ... + 120992.

Almost surely, 2^129129368 is an apocalyptic number.

It is an amenable number.

129129368 is a deficient number, since it is larger than the sum of its proper divisors (116602912).

129129368 is a wasteful number, since it uses less digits than its factorization.

129129368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240986 (or 240982 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 129129368 is about 11363.5103731197. The cubic root of 129129368 is about 505.4462845717.

The spelling of 129129368 in words is "one hundred twenty-nine million, one hundred twenty-nine thousand, three hundred sixty-eight".