8218669 has 2 divisors, whose sum is σ = 8218670. Its totient is φ = 8218668.

The previous prime is 8218663. The next prime is 8218681. The reversal of 8218669 is 9668128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 2601769 = 2370^2 + 1613^2 .

It is a cyclic number.

It is not a de Polignac number, because 8218669 - 2⁷ = 8218541 is a prime.

It is a super-2 number, since 2×8218669² = 135093040263122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8218663) 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, 4109334 + 4109335.

It is an arithmetic number, because the mean of its divisors is an integer number (4109335).

Almost surely, 2^8218669 is an apocalyptic number.

It is an amenable number.

8218669 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218669 is an equidigital number, since it uses as much as digits as its factorization.

8218669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 8218669 is about 2866.8221081888. The cubic root of 8218669 is about 201.8058864588.

The spelling of 8218669 in words is "eight million, two hundred eighteen thousand, six hundred sixty-nine".