8218369 has 2 divisors, whose sum is σ = 8218370. Its totient is φ = 8218368.

The previous prime is 8218351. The next prime is 8218381. The reversal of 8218369 is 9638128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5345344 + 2873025 = 2312^2 + 1695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8218369 is a prime.

It is a super-2 number, since 2×8218369² = 135083178040322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8218319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109184 + 4109185.

It is an arithmetic number, because the mean of its divisors is an integer number (4109185).

Almost surely, 2^8218369 is an apocalyptic number.

It is an amenable number.

8218369 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218369 is an equidigital number, since it uses as much as digits as its factorization.

8218369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 8218369 is about 2866.7697849670. The cubic root of 8218369 is about 201.8034309719.

The spelling of 8218369 in words is "eight million, two hundred eighteen thousand, three hundred sixty-nine".