22166789 has 2 divisors, whose sum is σ = 22166790. Its totient is φ = 22166788.

The previous prime is 22166741. The next prime is 22166797. The reversal of 22166789 is 98766122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 2656900 = 4417^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 22166789 - 2¹⁶ = 22101253 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22166719) 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, 11083394 + 11083395.

It is an arithmetic number, because the mean of its divisors is an integer number (11083395).

Almost surely, 2^22166789 is an apocalyptic number.

It is an amenable number.

22166789 is a deficient number, since it is larger than the sum of its proper divisors (1).

22166789 is an equidigital number, since it uses as much as digits as its factorization.

22166789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 22166789 is about 4708.1619555831. The cubic root of 22166789 is about 280.9102561654.

The spelling of 22166789 in words is "twenty-two million, one hundred sixty-six thousand, seven hundred eighty-nine".