129166943 has 2 divisors, whose sum is σ = 129166944. Its totient is φ = 129166942.

The previous prime is 129166913. The next prime is 129166967. The reversal of 129166943 is 349661921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129166943 - 2²⁴ = 112389727 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129166943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129166903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64583471 + 64583472.

It is an arithmetic number, because the mean of its divisors is an integer number (64583472).

Almost surely, 2^129166943 is an apocalyptic number.

129166943 is a deficient number, since it is larger than the sum of its proper divisors (1).

129166943 is an equidigital number, since it uses as much as digits as its factorization.

129166943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 129166943 is about 11365.1635711942. The cubic root of 129166943 is about 505.4953059590.

The spelling of 129166943 in words is "one hundred twenty-nine million, one hundred sixty-six thousand, nine hundred forty-three".