128544887 has 2 divisors, whose sum is σ = 128544888. Its totient is φ = 128544886.

The previous prime is 128544883. The next prime is 128544917. The reversal of 128544887 is 788445821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128544887 - 2² = 128544883 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128544883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64272443 + 64272444.

It is an arithmetic number, because the mean of its divisors is an integer number (64272444).

Almost surely, 2^128544887 is an apocalyptic number.

128544887 is a deficient number, since it is larger than the sum of its proper divisors (1).

128544887 is an equidigital number, since it uses as much as digits as its factorization.

128544887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 573440, while the sum is 47.

The square root of 128544887 is about 11337.7637565792. The cubic root of 128544887 is about 504.6825269895.

The spelling of 128544887 in words is "one hundred twenty-eight million, five hundred forty-four thousand, eight hundred eighty-seven".