129913271 has 2 divisors, whose sum is σ = 129913272. Its totient is φ = 129913270.

The previous prime is 129913247. The next prime is 129913307. The reversal of 129913271 is 172319921.

It is a weak prime.

It is an emirp because it is prime and its reverse (172319921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129913271 - 2⁶ = 129913207 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129913171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64956635 + 64956636.

It is an arithmetic number, because the mean of its divisors is an integer number (64956636).

Almost surely, 2^129913271 is an apocalyptic number.

129913271 is a deficient number, since it is larger than the sum of its proper divisors (1).

129913271 is an equidigital number, since it uses as much as digits as its factorization.

129913271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 129913271 is about 11397.9502981896. The cubic root of 129913271 is about 506.4670226153.

The spelling of 129913271 in words is "one hundred twenty-nine million, nine hundred thirteen thousand, two hundred seventy-one".