129497875217 has 8 divisors (see below), whose sum is σ = 141014020800. Its totient is φ = 118451776464.

The previous prime is 129497875193. The next prime is 129497875237. The reversal of 129497875217 is 712578794921.

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

It is not a de Polignac number, because 129497875217 - 2¹⁸ = 129497613073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129497875217.

It is not an unprimeable number, because it can be changed into a prime (129497875237) 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, 117511133 + ... + 117512234.

It is an arithmetic number, because the mean of its divisors is an integer number (17626752600).

Almost surely, 2^129497875217 is an apocalyptic number.

It is an amenable number.

129497875217 is a deficient number, since it is larger than the sum of its proper divisors (11516145583).

129497875217 is a wasteful number, since it uses less digits than its factorization.

129497875217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235023415.

The product of its digits is 17781120, while the sum is 62.

The spelling of 129497875217 in words is "one hundred twenty-nine billion, four hundred ninety-seven million, eight hundred seventy-five thousand, two hundred seventeen".