129212908 has 12 divisors (see below), whose sum is σ = 246679272. Its totient is φ = 58733120.

The previous prime is 129212861. The next prime is 129212927. The reversal of 129212908 is 809212921.

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, 1468285 + ... + 1468372.

It is an arithmetic number, because the mean of its divisors is an integer number (20556606).

Almost surely, 2^129212908 is an apocalyptic number.

It is an amenable number.

129212908 is a deficient number, since it is larger than the sum of its proper divisors (117466364).

129212908 is a wasteful number, since it uses less digits than its factorization.

129212908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936672 (or 2936670 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 129212908 is about 11367.1855795531. The cubic root of 129212908 is about 505.5552602466. Note that the first 3 decimals are identical.

The spelling of 129212908 in words is "one hundred twenty-nine million, two hundred twelve thousand, nine hundred eight".