22223989 has 2 divisors, whose sum is σ = 22223990. Its totient is φ = 22223988.

The previous prime is 22223983. The next prime is 22224023. The reversal of 22223989 is 98932222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18922500 + 3301489 = 4350^2 + 1817^2 .

It is a cyclic number.

It is not a de Polignac number, because 22223989 - 2⁹ = 22223477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22223983) 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, 11111994 + 11111995.

It is an arithmetic number, because the mean of its divisors is an integer number (11111995).

Almost surely, 2^22223989 is an apocalyptic number.

It is an amenable number.

22223989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22223989 is an equidigital number, since it uses as much as digits as its factorization.

22223989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 22223989 is about 4714.2325992679. The cubic root of 22223989 is about 281.1516723603.

The spelling of 22223989 in words is "twenty-two million, two hundred twenty-three thousand, nine hundred eighty-nine".