129923064 has 96 divisors (see below), whose sum is σ = 375757200. Its totient is φ = 40435200.

The previous prime is 129923051. The next prime is 129923069. The reversal of 129923064 is 460329921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129923069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99214 + ... + 100514.

Almost surely, 2^129923064 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 129923064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187878600).

129923064 is an abundant number, since it is smaller than the sum of its proper divisors (245834136).

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

129923064 is a wasteful number, since it uses less digits than its factorization.

129923064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 129923064 is about 11398.3798848784. The cubic root of 129923064 is about 506.4797483024.

The spelling of 129923064 in words is "one hundred twenty-nine million, nine hundred twenty-three thousand, sixty-four".