129996136 has 16 divisors (see below), whose sum is σ = 245498400. Its totient is φ = 64529904.

The previous prime is 129996131. The next prime is 129996187. The reversal of 129996136 is 631699921.

It is not an unprimeable number, because it can be changed into a prime (129996131) by changing a digit.

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, 57340 + ... + 59563.

It is an arithmetic number, because the mean of its divisors is an integer number (15343650).

Almost surely, 2^129996136 is an apocalyptic number.

It is an amenable number.

129996136 is a deficient number, since it is larger than the sum of its proper divisors (115502264).

129996136 is a wasteful number, since it uses less digits than its factorization.

129996136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117048 (or 117044 counting only the distinct ones).

The product of its digits is 157464, while the sum is 46.

The square root of 129996136 is about 11401.5848021229. The cubic root of 129996136 is about 506.5746828245.

The spelling of 129996136 in words is "one hundred twenty-nine million, nine hundred ninety-six thousand, one hundred thirty-six".