129755934 has 96 divisors (see below), whose sum is σ = 371195136. Its totient is φ = 31714560.

The previous prime is 129755933. The next prime is 129755957. The reversal of 129755934 is 439557921.

It is a happy number.

129755934 is a `hidden beast` number, since 1 + 2 + 97 + 559 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 129755934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129755933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20809 + ... + 26315.

It is an arithmetic number, because the mean of its divisors is an integer number (3866616).

Almost surely, 2^129755934 is an apocalyptic number.

129755934 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129755934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185597568).

129755934 is an abundant number, since it is smaller than the sum of its proper divisors (241439202).

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

129755934 is a wasteful number, since it uses less digits than its factorization.

129755934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550 (or 5547 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 129755934 is about 11391.0462206068. The cubic root of 129755934 is about 506.2624805337.

The spelling of 129755934 in words is "one hundred twenty-nine million, seven hundred fifty-five thousand, nine hundred thirty-four".