8984221 has 2 divisors, whose sum is σ = 8984222. Its totient is φ = 8984220.

The previous prime is 8984219. The next prime is 8984243. The reversal of 8984221 is 1224898.

8984221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5040025 + 3944196 = 2245^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 8984221 - 2¹ = 8984219 is a prime.

Together with 8984219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8984201) 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 as a sum of consecutive naturals, namely, 4492110 + 4492111.

It is an arithmetic number, because the mean of its divisors is an integer number (4492111).

Almost surely, 2^8984221 is an apocalyptic number.

It is an amenable number.

8984221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8984221 is an equidigital number, since it uses as much as digits as its factorization.

8984221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 8984221 is about 2997.3690129846. The cubic root of 8984221 is about 207.8867495550.

The spelling of 8984221 in words is "eight million, nine hundred eighty-four thousand, two hundred twenty-one".