129551873 has 8 divisors (see below), whose sum is σ = 141529440. Its totient is φ = 117607680.

The previous prime is 129551843. The next prime is 129551887. The reversal of 129551873 is 378155921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129551873 - 2¹⁰ = 129550849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129551873.

It is not an unprimeable number, because it can be changed into a prime (129551813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161 + ... + 16097.

It is an arithmetic number, because the mean of its divisors is an integer number (17691180).

Almost surely, 2^129551873 is an apocalyptic number.

It is an amenable number.

129551873 is a deficient number, since it is larger than the sum of its proper divisors (11977567).

129551873 is a wasteful number, since it uses less digits than its factorization.

129551873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16687.

The product of its digits is 75600, while the sum is 41.

The square root of 129551873 is about 11382.0856173199. The cubic root of 129551873 is about 505.9969496293.

The spelling of 129551873 in words is "one hundred twenty-nine million, five hundred fifty-one thousand, eight hundred seventy-three".