129166289 has 8 divisors (see below), whose sum is σ = 156302208. Its totient is φ = 104201280.

The previous prime is 129166249. The next prime is 129166307. The reversal of 129166289 is 982661921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129166289 - 2⁸ = 129166033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129166249) 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 in 7 ways as a sum of consecutive naturals, for example, 542597 + ... + 542834.

It is an arithmetic number, because the mean of its divisors is an integer number (19537776).

Almost surely, 2^129166289 is an apocalyptic number.

It is an amenable number.

129166289 is a deficient number, since it is larger than the sum of its proper divisors (27135919).

129166289 is a wasteful number, since it uses less digits than its factorization.

129166289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085455.

The product of its digits is 93312, while the sum is 44.

The square root of 129166289 is about 11365.1347990246. The cubic root of 129166289 is about 505.4944528138.

The spelling of 129166289 in words is "one hundred twenty-nine million, one hundred sixty-six thousand, two hundred eighty-nine".