8422217 has 2 divisors, whose sum is σ = 8422218. Its totient is φ = 8422216.

The previous prime is 8422213. The next prime is 8422223. The reversal of 8422217 is 7122248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6431296 + 1990921 = 2536^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 8422217 - 2² = 8422213 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (8422213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4211108 + 4211109.

It is an arithmetic number, because the mean of its divisors is an integer number (4211109).

Almost surely, 2^8422217 is an apocalyptic number.

It is an amenable number.

8422217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8422217 is an equidigital number, since it uses as much as digits as its factorization.

8422217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 26.

The square root of 8422217 is about 2902.1056148941. The cubic root of 8422217 is about 203.4583300836.

The spelling of 8422217 in words is "eight million, four hundred twenty-two thousand, two hundred seventeen".