9887887 has 2 divisors, whose sum is σ = 9887888. Its totient is φ = 9887886.

The previous prime is 9887881. The next prime is 9887909. The reversal of 9887887 is 7887889.

9887887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (7887889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9887887 - 2¹⁵ = 9855119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9887881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4943943 + 4943944.

It is an arithmetic number, because the mean of its divisors is an integer number (4943944).

Almost surely, 2^9887887 is an apocalyptic number.

9887887 is a deficient number, since it is larger than the sum of its proper divisors (1).

9887887 is an equidigital number, since it uses as much as digits as its factorization.

9887887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 55.

The square root of 9887887 is about 3144.5010733024. The cubic root of 9887887 is about 214.6353074677.

The spelling of 9887887 in words is "nine million, eight hundred eighty-seven thousand, eight hundred eighty-seven".