8468221 has 2 divisors, whose sum is σ = 8468222. Its totient is φ = 8468220.

The previous prime is 8468183. The next prime is 8468237. The reversal of 8468221 is 1228648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8468100 + 121 = 2910^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 8468221 - 2¹⁷ = 8337149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8468521) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4234110 + 4234111.

It is an arithmetic number, because the mean of its divisors is an integer number (4234111).

Almost surely, 2^8468221 is an apocalyptic number.

It is an amenable number.

8468221 is a deficient number, since it is larger than the sum of its proper divisors (1).

8468221 is an equidigital number, since it uses as much as digits as its factorization.

8468221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 31.

The square root of 8468221 is about 2910.0207903037. The cubic root of 8468221 is about 203.8281023421.

The spelling of 8468221 in words is "eight million, four hundred sixty-eight thousand, two hundred twenty-one".