2128587887 has 2 divisors, whose sum is σ = 2128587888. Its totient is φ = 2128587886.

The previous prime is 2128587883. The next prime is 2128587919. The reversal of 2128587887 is 7887858212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2128587887 - 2² = 2128587883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128587883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064293943 + 1064293944.

It is an arithmetic number, because the mean of its divisors is an integer number (1064293944).

Almost surely, 2^2128587887 is an apocalyptic number.

2128587887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128587887 is an equidigital number, since it uses as much as digits as its factorization.

2128587887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4014080, while the sum is 56.

The square root of 2128587887 is about 46136.6219721384. The cubic root of 2128587887 is about 1286.3639545848.

The spelling of 2128587887 in words is "two billion, one hundred twenty-eight million, five hundred eighty-seven thousand, eight hundred eighty-seven".