128089879 has 2 divisors, whose sum is σ = 128089880. Its totient is φ = 128089878.

The previous prime is 128089877. The next prime is 128089891. The reversal of 128089879 is 978980821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128089879 - 2¹ = 128089877 is a prime.

Together with 128089877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128089877) 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, 64044939 + 64044940.

It is an arithmetic number, because the mean of its divisors is an integer number (64044940).

Almost surely, 2^128089879 is an apocalyptic number.

128089879 is a deficient number, since it is larger than the sum of its proper divisors (1).

128089879 is an equidigital number, since it uses as much as digits as its factorization.

128089879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 128089879 is about 11317.6799300917. The cubic root of 128089879 is about 504.0863511552.

The spelling of 128089879 in words is "one hundred twenty-eight million, eighty-nine thousand, eight hundred seventy-nine".