128885611 has 2 divisors, whose sum is σ = 128885612. Its totient is φ = 128885610.

The previous prime is 128885579. The next prime is 128885621. The reversal of 128885611 is 116588821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128885611 - 2⁵ = 128885579 is a prime.

It is a super-2 number, since 2×128885611² = 33223001445686642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128885621) 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 as a sum of consecutive naturals, namely, 64442805 + 64442806.

It is an arithmetic number, because the mean of its divisors is an integer number (64442806).

Almost surely, 2^128885611 is an apocalyptic number.

128885611 is a deficient number, since it is larger than the sum of its proper divisors (1).

128885611 is an equidigital number, since it uses as much as digits as its factorization.

128885611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 40.

The square root of 128885611 is about 11352.7798798356. The cubic root of 128885611 is about 505.1280412510.

The spelling of 128885611 in words is "one hundred twenty-eight million, eight hundred eighty-five thousand, six hundred eleven".