128312887 has 2 divisors, whose sum is σ = 128312888. Its totient is φ = 128312886.

The previous prime is 128312881. The next prime is 128312893. The reversal of 128312887 is 788213821.

It is a balanced prime because it is at equal distance from previous prime (128312881) and next prime (128312893).

It is a cyclic number.

It is not a de Polignac number, because 128312887 - 2⁷ = 128312759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128312881) 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, 64156443 + 64156444.

It is an arithmetic number, because the mean of its divisors is an integer number (64156444).

Almost surely, 2^128312887 is an apocalyptic number.

128312887 is a deficient number, since it is larger than the sum of its proper divisors (1).

128312887 is an equidigital number, since it uses as much as digits as its factorization.

128312887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 40.

The square root of 128312887 is about 11327.5278415019. The cubic root of 128312887 is about 504.3787242751.

The spelling of 128312887 in words is "one hundred twenty-eight million, three hundred twelve thousand, eight hundred eighty-seven".