22005749 has 2 divisors, whose sum is σ = 22005750. Its totient is φ = 22005748.

The previous prime is 22005719. The next prime is 22005791. The reversal of 22005749 is 94750022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19624900 + 2380849 = 4430^2 + 1543^2 .

It is a cyclic number.

It is not a de Polignac number, because 22005749 - 2¹² = 22001653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22005719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11002874 + 11002875.

It is an arithmetic number, because the mean of its divisors is an integer number (11002875).

Almost surely, 2^22005749 is an apocalyptic number.

It is an amenable number.

22005749 is a deficient number, since it is larger than the sum of its proper divisors (1).

22005749 is an equidigital number, since it uses as much as digits as its factorization.

22005749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 22005749 is about 4691.0285652509. The cubic root of 22005749 is about 280.2283384006.

The spelling of 22005749 in words is "twenty-two million, five thousand, seven hundred forty-nine".