8218817 has 2 divisors, whose sum is σ = 8218818. Its totient is φ = 8218816.

The previous prime is 8218801. The next prime is 8218831. The reversal of 8218817 is 7188128.

8218817 is digitally balanced in base 3, 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., 7639696 + 579121 = 2764^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 8218817 - 2⁴ = 8218801 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (8218897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109408 + 4109409.

It is an arithmetic number, because the mean of its divisors is an integer number (4109409).

Almost surely, 2^8218817 is an apocalyptic number.

It is an amenable number.

8218817 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218817 is an equidigital number, since it uses as much as digits as its factorization.

8218817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 35.

The square root of 8218817 is about 2866.8479206264. The cubic root of 8218817 is about 201.8070978103.

The spelling of 8218817 in words is "eight million, two hundred eighteen thousand, eight hundred seventeen".