22017689 has 2 divisors, whose sum is σ = 22017690. Its totient is φ = 22017688.

The previous prime is 22017661. The next prime is 22017691. The reversal of 22017689 is 98671022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21086464 + 931225 = 4592^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 22017689 - 2⁸ = 22017433 is a prime.

It is a Sophie Germain prime.

Together with 22017691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22017629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11008844 + 11008845.

It is an arithmetic number, because the mean of its divisors is an integer number (11008845).

Almost surely, 2^22017689 is an apocalyptic number.

It is an amenable number.

22017689 is a deficient number, since it is larger than the sum of its proper divisors (1).

22017689 is an equidigital number, since it uses as much as digits as its factorization.

22017689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 22017689 is about 4692.3010346737. The cubic root of 22017689 is about 280.2790118465.

The spelling of 22017689 in words is "twenty-two million, seventeen thousand, six hundred eighty-nine".