22509589 has 2 divisors, whose sum is σ = 22509590. Its totient is φ = 22509588.

The previous prime is 22509587. The next prime is 22509601. The reversal of 22509589 is 98590522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15920100 + 6589489 = 3990^2 + 2567^2 .

It is a cyclic number.

It is not a de Polignac number, because 22509589 - 2¹ = 22509587 is a prime.

Together with 22509587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22509583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11254794 + 11254795.

It is an arithmetic number, because the mean of its divisors is an integer number (11254795).

Almost surely, 2^22509589 is an apocalyptic number.

It is an amenable number.

22509589 is a deficient number, since it is larger than the sum of its proper divisors (1).

22509589 is an equidigital number, since it uses as much as digits as its factorization.

22509589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 22509589 is about 4744.4271519331. The cubic root of 22509589 is about 282.3509078327.

The spelling of 22509589 in words is "twenty-two million, five hundred nine thousand, five hundred eighty-nine".