129039908 has 12 divisors (see below), whose sum is σ = 233606940. Its totient is φ = 62295072.

The previous prime is 129039901. The next prime is 129039941. The reversal of 129039908 is 809930921.

It can be written as a sum of positive squares in 2 ways, for example, as 92775424 + 36264484 = 9632^2 + 6022^2 .

It is not an unprimeable number, because it can be changed into a prime (129039901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556091 + ... + 556322.

It is an arithmetic number, because the mean of its divisors is an integer number (19467245).

Almost surely, 2^129039908 is an apocalyptic number.

It is an amenable number.

129039908 is a deficient number, since it is larger than the sum of its proper divisors (104567032).

129039908 is a wasteful number, since it uses less digits than its factorization.

129039908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112446 (or 1112444 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 129039908 is about 11359.5734074832. The cubic root of 129039908 is about 505.3295342889.

The spelling of 129039908 in words is "one hundred twenty-nine million, thirty-nine thousand, nine hundred eight".