129323934 has 36 divisors (see below), whose sum is σ = 290231136. Its totient is φ = 41616624.

The previous prime is 129323933. The next prime is 129323959. The reversal of 129323934 is 439323921.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129323933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10867 + ... + 19409.

It is an arithmetic number, because the mean of its divisors is an integer number (8061976).

Almost surely, 2^129323934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129323934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145115568).

129323934 is an abundant number, since it is smaller than the sum of its proper divisors (160907202).

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

129323934 is a wasteful number, since it uses less digits than its factorization.

129323934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8609 (or 8577 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 129323934 is about 11372.0681496375. The cubic root of 129323934 is about 505.7000179967.

The spelling of 129323934 in words is "one hundred twenty-nine million, three hundred twenty-three thousand, nine hundred thirty-four".