129908845 has 16 divisors (see below), whose sum is σ = 170696448. Its totient is φ = 94127040.

The previous prime is 129908843. The next prime is 129908851. The reversal of 129908845 is 548809921.

It is not a de Polignac number, because 129908845 - 2¹ = 129908843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129908795 and 129908804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129908843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10972 + ... + 19498.

It is an arithmetic number, because the mean of its divisors is an integer number (10668528).

Almost surely, 2^129908845 is an apocalyptic number.

It is an amenable number.

129908845 is a deficient number, since it is larger than the sum of its proper divisors (40787603).

129908845 is a wasteful number, since it uses less digits than its factorization.

129908845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 129908845 is about 11397.7561388196. The cubic root of 129908845 is about 506.4612709614.

The spelling of 129908845 in words is "one hundred twenty-nine million, nine hundred eight thousand, eight hundred forty-five".