622404217 has 2 divisors, whose sum is σ = 622404218. Its totient is φ = 622404216.

The previous prime is 622404199. The next prime is 622404229. The reversal of 622404217 is 712404226.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451945081 + 170459136 = 21259^2 + 13056^2 .

It is a cyclic number.

It is not a de Polignac number, because 622404217 - 2¹¹ = 622402169 is a prime.

It is a super-3 number, since 3×622404217³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (622404257) 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 as a sum of consecutive naturals, namely, 311202108 + 311202109.

It is an arithmetic number, because the mean of its divisors is an integer number (311202109).

Almost surely, 2^622404217 is an apocalyptic number.

It is an amenable number.

622404217 is a deficient number, since it is larger than the sum of its proper divisors (1).

622404217 is an equidigital number, since it uses as much as digits as its factorization.

622404217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 622404217 is about 24948.0303230536. The cubic root of 622404217 is about 853.8026704685.

Subtracting 622404217 from its reverse (712404226), we obtain a palindrome (90000009).

The spelling of 622404217 in words is "six hundred twenty-two million, four hundred four thousand, two hundred seventeen".