22663549 has 2 divisors, whose sum is σ = 22663550. Its totient is φ = 22663548.

The previous prime is 22663547. The next prime is 22663603. The reversal of 22663549 is 94536622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14212900 + 8450649 = 3770^2 + 2907^2 .

It is a cyclic number.

It is not a de Polignac number, because 22663549 - 2¹ = 22663547 is a prime.

Together with 22663547, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22663547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11331774 + 11331775.

It is an arithmetic number, because the mean of its divisors is an integer number (11331775).

Almost surely, 2^22663549 is an apocalyptic number.

It is an amenable number.

22663549 is a deficient number, since it is larger than the sum of its proper divisors (1).

22663549 is an equidigital number, since it uses as much as digits as its factorization.

22663549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 22663549 is about 4760.6248539451. The cubic root of 22663549 is about 282.9931824201.

The spelling of 22663549 in words is "twenty-two million, six hundred sixty-three thousand, five hundred forty-nine".