128970317 has 8 divisors (see below), whose sum is σ = 148826496. Its totient is φ = 109472112.

The previous prime is 128970307. The next prime is 128970329. The reversal of 128970317 is 713079821.

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 128970317 - 2⁴ = 128970301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128970307) 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 in 7 ways as a sum of consecutive naturals, for example, 88718 + ... + 90159.

It is an arithmetic number, because the mean of its divisors is an integer number (18603312).

Almost surely, 2^128970317 is an apocalyptic number.

It is an amenable number.

128970317 is a deficient number, since it is larger than the sum of its proper divisors (19856179).

128970317 is a wasteful number, since it uses less digits than its factorization.

128970317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178987.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 128970317 is about 11356.5098952099. The cubic root of 128970317 is about 505.2386768382.

The spelling of 128970317 in words is "one hundred twenty-eight million, nine hundred seventy thousand, three hundred seventeen".