129680851 has 2 divisors, whose sum is σ = 129680852. Its totient is φ = 129680850.

The previous prime is 129680839. The next prime is 129680867. The reversal of 129680851 is 158086921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129680851 - 2⁷ = 129680723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129680801) 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, 64840425 + 64840426.

It is an arithmetic number, because the mean of its divisors is an integer number (64840426).

Almost surely, 2^129680851 is an apocalyptic number.

129680851 is a deficient number, since it is larger than the sum of its proper divisors (1).

129680851 is an equidigital number, since it uses as much as digits as its factorization.

129680851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 129680851 is about 11387.7500411627. The cubic root of 129680851 is about 506.1648124507.

The spelling of 129680851 in words is "one hundred twenty-nine million, six hundred eighty thousand, eight hundred fifty-one".