9869887 has 4 divisors (see below), whose sum is σ = 9876496. Its totient is φ = 9863280.

The previous prime is 9869869. The next prime is 9869903. The reversal of 9869887 is 7889689.

9869887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9869887 - 2¹⁹ = 9345599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9869857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118 + ... + 4444.

It is an arithmetic number, because the mean of its divisors is an integer number (2469124).

Almost surely, 2^9869887 is an apocalyptic number.

9869887 is a deficient number, since it is larger than the sum of its proper divisors (6609).

9869887 is a wasteful number, since it uses less digits than its factorization.

9869887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608.

The product of its digits is 1741824, while the sum is 55.

The square root of 9869887 is about 3141.6376302814. The cubic root of 9869887 is about 214.5049869974.

The spelling of 9869887 in words is "nine million, eight hundred sixty-nine thousand, eight hundred eighty-seven".