22209989 has 2 divisors, whose sum is σ = 22209990. Its totient is φ = 22209988.

The previous prime is 22209983. The next prime is 22209997. The reversal of 22209989 is 98990222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 10029889 = 3490^2 + 3167^2 .

It is a cyclic number.

It is not a de Polignac number, because 22209989 - 2¹⁶ = 22144453 is a prime.

It is a super-2 number, since 2×22209989² = 986567222760242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22209983) 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, 11104994 + 11104995.

It is an arithmetic number, because the mean of its divisors is an integer number (11104995).

Almost surely, 2^22209989 is an apocalyptic number.

It is an amenable number.

22209989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22209989 is an equidigital number, since it uses as much as digits as its factorization.

22209989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 22209989 is about 4712.7475001320. The cubic root of 22209989 is about 281.0926228016.

The spelling of 22209989 in words is "twenty-two million, two hundred nine thousand, nine hundred eighty-nine".