9989871 has 8 divisors (see below), whose sum is σ = 13336320. Its totient is φ = 6651672.

The previous prime is 9989849. The next prime is 9989879. The reversal of 9989871 is 1789899.

9989871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9989871 - 2⁶ = 9989807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1800 + ... + 4818.

It is an arithmetic number, because the mean of its divisors is an integer number (1667040).

Almost surely, 2^9989871 is an apocalyptic number.

9989871 is a deficient number, since it is larger than the sum of its proper divisors (3346449).

9989871 is a wasteful number, since it uses less digits than its factorization.

9989871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125.

The product of its digits is 326592, while the sum is 51.

The square root of 9989871 is about 3160.6757188930. The cubic root of 9989871 is about 215.3707035330.

The spelling of 9989871 in words is "nine million, nine hundred eighty-nine thousand, eight hundred seventy-one".