22685989 has 2 divisors, whose sum is σ = 22685990. Its totient is φ = 22685988.

The previous prime is 22685977. The next prime is 22686049. The reversal of 22685989 is 98958622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13432225 + 9253764 = 3665^2 + 3042^2 .

It is a cyclic number.

It is not a de Polignac number, because 22685989 - 2¹⁵ = 22653221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22685959) 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, 11342994 + 11342995.

It is an arithmetic number, because the mean of its divisors is an integer number (11342995).

Almost surely, 2^22685989 is an apocalyptic number.

It is an amenable number.

22685989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22685989 is an equidigital number, since it uses as much as digits as its factorization.

22685989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 49.

The square root of 22685989 is about 4762.9811043085. The cubic root of 22685989 is about 283.0865522075.

The spelling of 22685989 in words is "twenty-two million, six hundred eighty-five thousand, nine hundred eighty-nine".