129129068 has 6 divisors (see below), whose sum is σ = 225975876. Its totient is φ = 64564532.

The previous prime is 129129067. The next prime is 129129079. The reversal of 129129068 is 860921921.

It is not an unprimeable number, because it can be changed into a prime (129129067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16141130 + ... + 16141137.

It is an arithmetic number, because the mean of its divisors is an integer number (37662646).

Almost surely, 2^129129068 is an apocalyptic number.

It is an amenable number.

129129068 is a deficient number, since it is larger than the sum of its proper divisors (96846808).

129129068 is a wasteful number, since it uses less digits than its factorization.

129129068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32282271 (or 32282269 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 129129068 is about 11363.4971729657. The cubic root of 129129068 is about 505.4458931451.

The spelling of 129129068 in words is "one hundred twenty-nine million, one hundred twenty-nine thousand, sixty-eight".