128959017 has 24 divisors (see below), whose sum is σ = 192592512. Its totient is φ = 76670880.

The previous prime is 128959013. The next prime is 128959037. The reversal of 128959017 is 710959821.

It is not a de Polignac number, because 128959017 - 2² = 128959013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128959017.

It is not an unprimeable number, because it can be changed into a prime (128959013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15888 + ... + 22590.

It is an arithmetic number, because the mean of its divisors is an integer number (8024688).

Almost surely, 2^128959017 is an apocalyptic number.

It is an amenable number.

128959017 is a deficient number, since it is larger than the sum of its proper divisors (63633495).

128959017 is a wasteful number, since it uses less digits than its factorization.

128959017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781 (or 6770 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 128959017 is about 11356.0123723075. The cubic root of 128959017 is about 505.2239205647.

It can be divided in two parts, 12895 and 9017, that added together give a palindrome (21912).

The spelling of 128959017 in words is "one hundred twenty-eight million, nine hundred fifty-nine thousand, seventeen".