128189627 has 2 divisors, whose sum is σ = 128189628. Its totient is φ = 128189626.

The previous prime is 128189521. The next prime is 128189629. The reversal of 128189627 is 726981821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128189627 - 2¹⁶ = 128124091 is a prime.

Together with 128189629, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128189629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64094813 + 64094814.

It is an arithmetic number, because the mean of its divisors is an integer number (64094814).

Almost surely, 2^128189627 is an apocalyptic number.

128189627 is a deficient number, since it is larger than the sum of its proper divisors (1).

128189627 is an equidigital number, since it uses as much as digits as its factorization.

128189627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 128189627 is about 11322.0858060695. The cubic root of 128189627 is about 504.2171670046.

The spelling of 128189627 in words is "one hundred twenty-eight million, one hundred eighty-nine thousand, six hundred twenty-seven".