22208689 has 2 divisors, whose sum is σ = 22208690. Its totient is φ = 22208688.

The previous prime is 22208677. The next prime is 22208707. The reversal of 22208689 is 98680222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20178064 + 2030625 = 4492^2 + 1425^2 .

It is a cyclic number.

It is not a de Polignac number, because 22208689 - 2⁵ = 22208657 is a prime.

It is not a weakly prime, because it can be changed into another prime (22208609) 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, 11104344 + 11104345.

It is an arithmetic number, because the mean of its divisors is an integer number (11104345).

Almost surely, 2^22208689 is an apocalyptic number.

It is an amenable number.

22208689 is a deficient number, since it is larger than the sum of its proper divisors (1).

22208689 is an equidigital number, since it uses as much as digits as its factorization.

22208689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 22208689 is about 4712.6095743229. The cubic root of 22208689 is about 281.0871383694.

The spelling of 22208689 in words is "twenty-two million, two hundred eight thousand, six hundred eighty-nine".