8220169 has 2 divisors, whose sum is σ = 8220170. Its totient is φ = 8220168.

The previous prime is 8220143. The next prime is 8220193. The reversal of 8220169 is 9610228.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6827769 + 1392400 = 2613^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 8220169 - 2⁹ = 8219657 is a prime.

It is a super-2 number, since 2×8220169² = 135142356777122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8220109) 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, 4110084 + 4110085.

It is an arithmetic number, because the mean of its divisors is an integer number (4110085).

Almost surely, 2^8220169 is an apocalyptic number.

It is an amenable number.

8220169 is a deficient number, since it is larger than the sum of its proper divisors (1).

8220169 is an equidigital number, since it uses as much as digits as its factorization.

8220169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 8220169 is about 2867.0837099743. The cubic root of 8220169 is about 201.8181629971.

The spelling of 8220169 in words is "eight million, two hundred twenty thousand, one hundred sixty-nine".