128066387 has 2 divisors, whose sum is σ = 128066388. Its totient is φ = 128066386.

The previous prime is 128066383. The next prime is 128066401. The reversal of 128066387 is 783660821.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (783660821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128066387 - 2² = 128066383 is a prime.

It is not a weakly prime, because it can be changed into another prime (128066381) 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, 64033193 + 64033194.

It is an arithmetic number, because the mean of its divisors is an integer number (64033194).

Almost surely, 2^128066387 is an apocalyptic number.

128066387 is a deficient number, since it is larger than the sum of its proper divisors (1).

128066387 is an equidigital number, since it uses as much as digits as its factorization.

128066387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 128066387 is about 11316.6420372830. The cubic root of 128066387 is about 504.0555323773.

The spelling of 128066387 in words is "one hundred twenty-eight million, sixty-six thousand, three hundred eighty-seven".