22684889 has 2 divisors, whose sum is σ = 22684890. Its totient is φ = 22684888.

The previous prime is 22684847. The next prime is 22684891. The reversal of 22684889 is 98848622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 9120400 = 3683^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 22684889 - 2¹² = 22680793 is a prime.

Together with 22684891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22684789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11342444 + 11342445.

It is an arithmetic number, because the mean of its divisors is an integer number (11342445).

Almost surely, 2^22684889 is an apocalyptic number.

It is an amenable number.

22684889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22684889 is an equidigital number, since it uses as much as digits as its factorization.

22684889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 47.

The square root of 22684889 is about 4762.8656290095. The cubic root of 22684889 is about 283.0819766927.

The spelling of 22684889 in words is "twenty-two million, six hundred eighty-four thousand, eight hundred eighty-nine".