129729008 has 20 divisors (see below), whose sum is σ = 251881200. Its totient is φ = 64727424.

The previous prime is 129728983. The next prime is 129729011. The reversal of 129729008 is 800927921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533 + ... + 16116.

It is an arithmetic number, because the mean of its divisors is an integer number (12594060).

Almost surely, 2^129729008 is an apocalyptic number.

It is an amenable number.

129729008 is a deficient number, since it is larger than the sum of its proper divisors (122152192).

129729008 is a wasteful number, since it uses less digits than its factorization.

129729008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17144 (or 17138 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 129729008 is about 11389.8642660920. The cubic root of 129729008 is about 506.2274594852.

The spelling of 129729008 in words is "one hundred twenty-nine million, seven hundred twenty-nine thousand, eight".