128611289 has 8 divisors (see below), whose sum is σ = 131400960. Its totient is φ = 125850816.

The previous prime is 128611267. The next prime is 128611313. The reversal of 128611289 is 982116821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128611289 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 (128611489) 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, 1724 + ... + 16130.

It is an arithmetic number, because the mean of its divisors is an integer number (16425120).

Almost surely, 2^128611289 is an apocalyptic number.

It is an amenable number.

128611289 is a deficient number, since it is larger than the sum of its proper divisors (2789671).

128611289 is a wasteful number, since it uses less digits than its factorization.

128611289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14599.

The product of its digits is 13824, while the sum is 38.

The square root of 128611289 is about 11340.6917337524. The cubic root of 128611289 is about 504.7694127491.

The spelling of 128611289 in words is "one hundred twenty-eight million, six hundred eleven thousand, two hundred eighty-nine".