22864489 has 2 divisors, whose sum is σ = 22864490. Its totient is φ = 22864488.

The previous prime is 22864477. The next prime is 22864493. The reversal of 22864489 is 98446822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 4305625 = 4308^2 + 2075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22864489 is a prime.

It is a super-2 number, since 2×22864489² = 1045569714462242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22864459) 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, 11432244 + 11432245.

It is an arithmetic number, because the mean of its divisors is an integer number (11432245).

Almost surely, 2^22864489 is an apocalyptic number.

It is an amenable number.

22864489 is a deficient number, since it is larger than the sum of its proper divisors (1).

22864489 is an equidigital number, since it uses as much as digits as its factorization.

22864489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 43.

The square root of 22864489 is about 4781.6826536273. The cubic root of 22864489 is about 283.8270826308.

The spelling of 22864489 in words is "twenty-two million, eight hundred sixty-four thousand, four hundred eighty-nine".