9789221 has 8 divisors (see below), whose sum is σ = 10721760. Its totient is φ = 8882352.

The previous prime is 9789203. The next prime is 9789257. The reversal of 9789221 is 1229879.

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 9789221 - 2²² = 5594917 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 (9789271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5615 + ... + 7148.

It is an arithmetic number, because the mean of its divisors is an integer number (1340220).

Almost surely, 2^9789221 is an apocalyptic number.

It is an amenable number.

9789221 is a deficient number, since it is larger than the sum of its proper divisors (932539).

9789221 is a wasteful number, since it uses less digits than its factorization.

9789221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12835.

The product of its digits is 18144, while the sum is 38.

The square root of 9789221 is about 3128.7730822161. The cubic root of 9789221 is about 213.9190088602.

The spelling of 9789221 in words is "nine million, seven hundred eighty-nine thousand, two hundred twenty-one".