129672871 has 2 divisors, whose sum is σ = 129672872. Its totient is φ = 129672870.

The previous prime is 129672869. The next prime is 129672877. The reversal of 129672871 is 178276921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129672871 - 2¹ = 129672869 is a prime.

Together with 129672869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129672877) 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 as a sum of consecutive naturals, namely, 64836435 + 64836436.

It is an arithmetic number, because the mean of its divisors is an integer number (64836436).

Almost surely, 2^129672871 is an apocalyptic number.

129672871 is a deficient number, since it is larger than the sum of its proper divisors (1).

129672871 is an equidigital number, since it uses as much as digits as its factorization.

129672871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The square root of 129672871 is about 11387.3996592725. The cubic root of 129672871 is about 506.1544298382.

The spelling of 129672871 in words is "one hundred twenty-nine million, six hundred seventy-two thousand, eight hundred seventy-one".