9871887 has 8 divisors (see below), whose sum is σ = 13855360. Its totient is φ = 6234840.

The previous prime is 9871877. The next prime is 9871891. The reversal of 9871887 is 7881789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9871887 - 2⁷ = 9871759 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 (9871817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86539 + ... + 86652.

It is an arithmetic number, because the mean of its divisors is an integer number (1731920).

Almost surely, 2^9871887 is an apocalyptic number.

9871887 is a deficient number, since it is larger than the sum of its proper divisors (3983473).

9871887 is a wasteful number, since it uses less digits than its factorization.

9871887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173213.

The product of its digits is 225792, while the sum is 48.

The square root of 9871887 is about 3141.9559194871. The cubic root of 9871887 is about 214.5194748701.

The spelling of 9871887 in words is "nine million, eight hundred seventy-one thousand, eight hundred eighty-seven".