129808055 has 24 divisors (see below), whose sum is σ = 169970400. Its totient is φ = 95122560.

The previous prime is 129808037. The next prime is 129808087. The reversal of 129808055 is 550808921.

It is not a de Polignac number, because 129808055 - 2¹⁶ = 129742519 is a prime.

It is a super-2 number, since 2×129808055² = 33700262285766050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125390 + ... + 126420.

It is an arithmetic number, because the mean of its divisors is an integer number (7082100).

Almost surely, 2^129808055 is an apocalyptic number.

129808055 is a deficient number, since it is larger than the sum of its proper divisors (40162345).

129808055 is a wasteful number, since it uses less digits than its factorization.

129808055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 129808055 is about 11393.3337965672. Note that the first 3 decimals coincide. The cubic root of 129808055 is about 506.3302574582.

The spelling of 129808055 in words is "one hundred twenty-nine million, eight hundred eight thousand, fifty-five".