129366689 has 8 divisors (see below), whose sum is σ = 137150208. Its totient is φ = 121808880.

The previous prime is 129366659. The next prime is 129366691. The reversal of 129366689 is 986663921.

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 129366689 - 2²⁴ = 112589473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129366659) 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, 55247 + ... + 57540.

It is an arithmetic number, because the mean of its divisors is an integer number (17143776).

Almost surely, 2^129366689 is an apocalyptic number.

It is an amenable number.

129366689 is a deficient number, since it is larger than the sum of its proper divisors (7783519).

129366689 is a wasteful number, since it uses less digits than its factorization.

129366689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112855.

The product of its digits is 839808, while the sum is 50.

The square root of 129366689 is about 11373.9478194688. The cubic root of 129366689 is about 505.7557406598.

The spelling of 129366689 in words is "one hundred twenty-nine million, three hundred sixty-six thousand, six hundred eighty-nine".