22236689 has 2 divisors, whose sum is σ = 22236690. Its totient is φ = 22236688.

The previous prime is 22236679. The next prime is 22236691. The reversal of 22236689 is 98663222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 146689 = 4700^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 22236689 - 2⁴ = 22236673 is a prime.

Together with 22236691, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (22236659) 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, 11118344 + 11118345.

It is an arithmetic number, because the mean of its divisors is an integer number (11118345).

Almost surely, 2^22236689 is an apocalyptic number.

It is an amenable number.

22236689 is a deficient number, since it is larger than the sum of its proper divisors (1).

22236689 is an equidigital number, since it uses as much as digits as its factorization.

22236689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 22236689 is about 4715.5793917609. The cubic root of 22236689 is about 281.2052172977.

The spelling of 22236689 in words is "twenty-two million, two hundred thirty-six thousand, six hundred eighty-nine".