129668271 has 8 divisors (see below), whose sum is σ = 174507264. Its totient is φ = 85637400.

The previous prime is 129668269. The next prime is 129668303. The reversal of 129668271 is 172866921.

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

It is not a de Polignac number, because 129668271 - 2¹ = 129668269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129668261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201655 + ... + 202296.

It is an arithmetic number, because the mean of its divisors is an integer number (21813408).

Almost surely, 2^129668271 is an apocalyptic number.

129668271 is a deficient number, since it is larger than the sum of its proper divisors (44838993).

129668271 is a wasteful number, since it uses less digits than its factorization.

129668271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404061.

The product of its digits is 72576, while the sum is 42.

The square root of 129668271 is about 11387.1976798508. The cubic root of 129668271 is about 506.1484446801.

The spelling of 129668271 in words is "one hundred twenty-nine million, six hundred sixty-eight thousand, two hundred seventy-one".