9787987 has 16 divisors (see below), whose sum is σ = 11052288. Its totient is φ = 8592480.

The previous prime is 9787969. The next prime is 9787991. The reversal of 9787987 is 7897879.

9787987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9787987 - 2⁷ = 9787859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9787997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59968 + ... + 60130.

It is an arithmetic number, because the mean of its divisors is an integer number (690768).

Almost surely, 2^9787987 is an apocalyptic number.

9787987 is a deficient number, since it is larger than the sum of its proper divisors (1264301).

9787987 is a wasteful number, since it uses less digits than its factorization.

9787987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

The product of its digits is 1778112, while the sum is 55.

The square root of 9787987 is about 3128.5758740999. The cubic root of 9787987 is about 213.9100198185.

It can be divided in two parts, 978798 and 7, that multiplied together give a palindrome (6851586).

The spelling of 9787987 in words is "nine million, seven hundred eighty-seven thousand, nine hundred eighty-seven".