9989143 has 4 divisors (see below), whose sum is σ = 10065528. Its totient is φ = 9912760.

The previous prime is 9989123. The next prime is 9989159. The reversal of 9989143 is 3419899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9989143 - 2²¹ = 7891991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9989143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989123) 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 3 ways as a sum of consecutive naturals, for example, 37996 + ... + 38257.

It is an arithmetic number, because the mean of its divisors is an integer number (2516382).

Almost surely, 2^9989143 is an apocalyptic number.

9989143 is a deficient number, since it is larger than the sum of its proper divisors (76385).

9989143 is a wasteful number, since it uses less digits than its factorization.

9989143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76384.

The product of its digits is 69984, while the sum is 43.

The square root of 9989143 is about 3160.5605515478. The cubic root of 9989143 is about 215.3654717777.

The spelling of 9989143 in words is "nine million, nine hundred eighty-nine thousand, one hundred forty-three".