128342884391 has 2 divisors, whose sum is σ = 128342884392. Its totient is φ = 128342884390.

The previous prime is 128342884337. The next prime is 128342884393. The reversal of 128342884391 is 193488243821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128342884391 - 2³⁴ = 111163015207 is a prime.

Together with 128342884393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128342884393) 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, 64171442195 + 64171442196.

It is an arithmetic number, because the mean of its divisors is an integer number (64171442196).

Almost surely, 2^128342884391 is an apocalyptic number.

128342884391 is a deficient number, since it is larger than the sum of its proper divisors (1).

128342884391 is an equidigital number, since it uses as much as digits as its factorization.

128342884391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2654208, while the sum is 53.

The spelling of 128342884391 in words is "one hundred twenty-eight billion, three hundred forty-two million, eight hundred eighty-four thousand, three hundred ninety-one".