22766209 has 2 divisors, whose sum is σ = 22766210. Its totient is φ = 22766208.

The previous prime is 22766143. The next prime is 22766231. The reversal of 22766209 is 90266722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20295025 + 2471184 = 4505^2 + 1572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22766209 is a prime.

It is not a weakly prime, because it can be changed into another prime (22766239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11383104 + 11383105.

It is an arithmetic number, because the mean of its divisors is an integer number (11383105).

Almost surely, 2^22766209 is an apocalyptic number.

It is an amenable number.

22766209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22766209 is an equidigital number, since it uses as much as digits as its factorization.

22766209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 22766209 is about 4771.3948694276. The cubic root of 22766209 is about 283.4198341041.

The spelling of 22766209 in words is "twenty-two million, seven hundred sixty-six thousand, two hundred nine".