8559841217 has 2 divisors, whose sum is σ = 8559841218. Its totient is φ = 8559841216.

The previous prime is 8559841189. The next prime is 8559841243. The reversal of 8559841217 is 7121489558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7430612401 + 1129228816 = 86201^2 + 33604^2 .

It is a cyclic number.

It is not a de Polignac number, because 8559841217 - 2¹⁶ = 8559775681 is a prime.

It is not a weakly prime, because it can be changed into another prime (8559841517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4279920608 + 4279920609.

It is an arithmetic number, because the mean of its divisors is an integer number (4279920609).

Almost surely, 2^8559841217 is an apocalyptic number.

It is an amenable number.

8559841217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8559841217 is an equidigital number, since it uses as much as digits as its factorization.

8559841217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 50.

The square root of 8559841217 is about 92519.4099473186. The cubic root of 8559841217 is about 2045.6055951200.

The spelling of 8559841217 in words is "eight billion, five hundred fifty-nine million, eight hundred forty-one thousand, two hundred seventeen".