129147934 has 12 divisors (see below), whose sum is σ = 195768144. Its totient is φ = 63898944.

The previous prime is 129147913. The next prime is 129147937. The reversal of 129147934 is 439741921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129147937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15387 + ... + 22249.

It is an arithmetic number, because the mean of its divisors is an integer number (16314012).

Almost surely, 2^129147934 is an apocalyptic number.

129147934 is a deficient number, since it is larger than the sum of its proper divisors (66620210).

129147934 is an frugal number, since it uses more digits than its factorization.

129147934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059 (or 6962 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 129147934 is about 11364.3272568155. The cubic root of 129147934 is about 505.4705074787.

The spelling of 129147934 in words is "one hundred twenty-nine million, one hundred forty-seven thousand, nine hundred thirty-four".