9887851 has 2 divisors, whose sum is σ = 9887852. Its totient is φ = 9887850.

The previous prime is 9887837. The next prime is 9887881. The reversal of 9887851 is 1587889.

9887851 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 a cyclic number.

It is not a de Polignac number, because 9887851 - 2⁵ = 9887819 is a prime.

It is not a weakly prime, because it can be changed into another prime (9887831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4943925 + 4943926.

It is an arithmetic number, because the mean of its divisors is an integer number (4943926).

Almost surely, 2^9887851 is an apocalyptic number.

9887851 is a deficient number, since it is larger than the sum of its proper divisors (1).

9887851 is an equidigital number, since it uses as much as digits as its factorization.

9887851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 46.

The square root of 9887851 is about 3144.4953490187. The cubic root of 9887851 is about 214.6350469847.

The spelling of 9887851 in words is "nine million, eight hundred eighty-seven thousand, eight hundred fifty-one".