9867987 has 12 divisors (see below), whose sum is σ = 14782040. Its totient is φ = 6578496.

The previous prime is 9867971. The next prime is 9868009. The reversal of 9867987 is 7897689.

9867987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9867987 - 2⁴ = 9867971 is a prime.

It is a Duffinian number.

9867987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9860987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20062 + ... + 20547.

Almost surely, 2^9867987 is an apocalyptic number.

9867987 is a deficient number, since it is larger than the sum of its proper divisors (4914053).

9867987 is an equidigital number, since it uses as much as digits as its factorization.

9867987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40624 (or 40612 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 9867987 is about 3141.3352256644. The cubic root of 9867987 is about 214.4912217054.

The spelling of 9867987 in words is "nine million, eight hundred sixty-seven thousand, nine hundred eighty-seven".