129989934 has 24 divisors (see below), whose sum is σ = 292077240. Its totient is φ = 43329816.

The previous prime is 129989927. The next prime is 129989957. The reversal of 129989934 is 439989921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133249 + ... + 134220.

It is an arithmetic number, because the mean of its divisors is an integer number (12169885).

Almost surely, 2^129989934 is an apocalyptic number.

129989934 is an abundant number, since it is smaller than the sum of its proper divisors (162087306).

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

129989934 is an equidigital number, since it uses as much as digits as its factorization.

129989934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267486 (or 267474 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 129989934 is about 11401.3128191450. The cubic root of 129989934 is about 506.5666266206.

The spelling of 129989934 in words is "one hundred twenty-nine million, nine hundred eighty-nine thousand, nine hundred thirty-four".