8220969 has 6 divisors (see below), whose sum is σ = 11874746. Its totient is φ = 5480640.

The previous prime is 8220937. The next prime is 8221009. The reversal of 8220969 is 9690228.

It can be written as a sum of positive squares in only one way, i.e., 4359744 + 3861225 = 2088^2 + 1965^2 .

It is not a de Polignac number, because 8220969 - 2⁵ = 8220937 is a prime.

It is a super-2 number, since 2×8220969² = 135168662597922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8220929) 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 in 5 ways as a sum of consecutive naturals, for example, 456712 + ... + 456729.

Almost surely, 2^8220969 is an apocalyptic number.

It is an amenable number.

8220969 is a deficient number, since it is larger than the sum of its proper divisors (3653777).

8220969 is a wasteful number, since it uses less digits than its factorization.

8220969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913447 (or 913444 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 8220969 is about 2867.2232211671. The cubic root of 8220969 is about 201.8247098736.

The spelling of 8220969 in words is "eight million, two hundred twenty thousand, nine hundred sixty-nine".