22566989 has 2 divisors, whose sum is σ = 22566990. Its totient is φ = 22566988.

The previous prime is 22566967. The next prime is 22566997. The reversal of 22566989 is 98966522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 4489 = 4750^2 + 67^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22566989 is a prime.

It is a super-2 number, since 2×22566989² = 1018537985052242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22566919) 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, 11283494 + 11283495.

It is an arithmetic number, because the mean of its divisors is an integer number (11283495).

Almost surely, 2^22566989 is an apocalyptic number.

It is an amenable number.

22566989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22566989 is an equidigital number, since it uses as much as digits as its factorization.

22566989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 22566989 is about 4750.4725028149. The cubic root of 22566989 is about 282.5907046820.

The spelling of 22566989 in words is "twenty-two million, five hundred sixty-six thousand, nine hundred eighty-nine".