129935688 has 16 divisors (see below), whose sum is σ = 324839280. Its totient is φ = 43311888.

The previous prime is 129935681. The next prime is 129935711. The reversal of 129935688 is 886539921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 129935688.

It is not an unprimeable number, because it can be changed into a prime (129935681) 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, 2706970 + ... + 2707017.

It is an arithmetic number, because the mean of its divisors is an integer number (20302455).

Almost surely, 2^129935688 is an apocalyptic number.

It is an amenable number.

129935688 is an abundant number, since it is smaller than the sum of its proper divisors (194903592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129935688 is a wasteful number, since it uses less digits than its factorization.

129935688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413996 (or 5413992 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 129935688 is about 11398.9336343362. The cubic root of 129935688 is about 506.4961518392.

It can be divided in two parts, 12993 and 5688, that added together give a palindrome (18681).

The spelling of 129935688 in words is "one hundred twenty-nine million, nine hundred thirty-five thousand, six hundred eighty-eight".