9989221 has 8 divisors (see below), whose sum is σ = 10922688. Its totient is φ = 9060000.

The previous prime is 9989197. The next prime is 9989227. The reversal of 9989221 is 1229899.

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

It is a cyclic number.

It is not a de Polignac number, because 9989221 - 2²¹ = 7892069 is a prime.

It is an Ulam number.

It is a Duffinian number.

9989221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989227) 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, 5856 + ... + 7366.

It is an arithmetic number, because the mean of its divisors is an integer number (1365336).

Almost surely, 2^9989221 is an apocalyptic number.

It is an amenable number.

9989221 is a deficient number, since it is larger than the sum of its proper divisors (933467).

9989221 is a wasteful number, since it uses less digits than its factorization.

9989221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123.

The product of its digits is 23328, while the sum is 40.

The square root of 9989221 is about 3160.5728911069. The cubic root of 9989221 is about 215.3660323351.

The spelling of 9989221 in words is "nine million, nine hundred eighty-nine thousand, two hundred twenty-one".