129366271 has 2 divisors, whose sum is σ = 129366272. Its totient is φ = 129366270.

The previous prime is 129366257. The next prime is 129366337. The reversal of 129366271 is 172663921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129366271 - 2¹³ = 129358079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129366271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129346271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64683135 + 64683136.

It is an arithmetic number, because the mean of its divisors is an integer number (64683136).

Almost surely, 2^129366271 is an apocalyptic number.

129366271 is a deficient number, since it is larger than the sum of its proper divisors (1).

129366271 is an equidigital number, since it uses as much as digits as its factorization.

129366271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 129366271 is about 11373.9294441279. The cubic root of 129366271 is about 505.7551959391.

The spelling of 129366271 in words is "one hundred twenty-nine million, three hundred sixty-six thousand, two hundred seventy-one".