22865729 has 2 divisors, whose sum is σ = 22865730. Its totient is φ = 22865728.

The previous prime is 22865719. The next prime is 22865747. The reversal of 22865729 is 92756822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 1567504 = 4615^2 + 1252^2 .

It is a cyclic number.

It is not a de Polignac number, because 22865729 - 2¹² = 22861633 is a prime.

It is not a weakly prime, because it can be changed into another prime (22865719) 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, 11432864 + 11432865.

It is an arithmetic number, because the mean of its divisors is an integer number (11432865).

Almost surely, 2^22865729 is an apocalyptic number.

It is an amenable number.

22865729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22865729 is an equidigital number, since it uses as much as digits as its factorization.

22865729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 22865729 is about 4781.8123133389. The cubic root of 22865729 is about 283.8322134288.

The spelling of 22865729 in words is "twenty-two million, eight hundred sixty-five thousand, seven hundred twenty-nine".