8109217 has 2 divisors, whose sum is σ = 8109218. Its totient is φ = 8109216.

The previous prime is 8109203. The next prime is 8109229. The reversal of 8109217 is 7129018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6574096 + 1535121 = 2564^2 + 1239^2 .

It is a cyclic number.

It is not a de Polignac number, because 8109217 - 2⁷ = 8109089 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (8109247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4054608 + 4054609.

It is an arithmetic number, because the mean of its divisors is an integer number (4054609).

Almost surely, 2^8109217 is an apocalyptic number.

It is an amenable number.

8109217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8109217 is an equidigital number, since it uses as much as digits as its factorization.

8109217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 8109217 is about 2847.6686956175. The cubic root of 8109217 is about 200.9060310078.

The spelling of 8109217 in words is "eight million, one hundred nine thousand, two hundred seventeen".