129929792 has 28 divisors (see below), whose sum is σ = 264802620. Its totient is φ = 63207936.

The previous prime is 129929753. The next prime is 129929797. The reversal of 129929792 is 297929921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64384576 + 65545216 = 8024^2 + 8096^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 129929792.

It is not an unprimeable number, because it can be changed into a prime (129929797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25067 + ... + 29802.

Almost surely, 2^129929792 is an apocalyptic number.

It is an amenable number.

129929792 is an abundant number, since it is smaller than the sum of its proper divisors (134872828).

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

129929792 is an equidigital number, since it uses as much as digits as its factorization.

129929792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54918 (or 54908 counting only the distinct ones).

The product of its digits is 367416, while the sum is 50.

The square root of 129929792 is about 11398.6750107194. The cubic root of 129929792 is about 506.4884907505.

The spelling of 129929792 in words is "one hundred twenty-nine million, nine hundred twenty-nine thousand, seven hundred ninety-two".