622668217 has 2 divisors, whose sum is σ = 622668218. Its totient is φ = 622668216.

The previous prime is 622668199. The next prime is 622668223. The reversal of 622668217 is 712866226.

622668217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530104576 + 92563641 = 23024^2 + 9621^2 .

It is a cyclic number.

It is not a de Polignac number, because 622668217 - 2⁷ = 622668089 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 622668217.

It is not a weakly prime, because it can be changed into another prime (622668257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311334108 + 311334109.

It is an arithmetic number, because the mean of its divisors is an integer number (311334109).

Almost surely, 2^622668217 is an apocalyptic number.

It is an amenable number.

622668217 is a deficient number, since it is larger than the sum of its proper divisors (1).

622668217 is an equidigital number, since it uses as much as digits as its factorization.

622668217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 622668217 is about 24953.3207609729. The cubic root of 622668217 is about 853.9233701880.

The spelling of 622668217 in words is "six hundred twenty-two million, six hundred sixty-eight thousand, two hundred seventeen".