129929984 has 36 divisors (see below), whose sum is σ = 265699560. Its totient is φ = 63375360.

The previous prime is 129929953. The next prime is 129930001. The reversal of 129929984 is 489929921.

It is an unprimeable number.

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, 4307 + ... + 16685.

Almost surely, 2^129929984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129929984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132849780).

129929984 is an abundant number, since it is smaller than the sum of its proper divisors (135769576).

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

129929984 is an equidigital number, since it uses as much as digits as its factorization.

129929984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12436 (or 12422 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 129929984 is about 11398.6834327478. The cubic root of 129929984 is about 506.4887402333.

The spelling of 129929984 in words is "one hundred twenty-nine million, nine hundred twenty-nine thousand, nine hundred eighty-four".