22890817 has 2 divisors, whose sum is σ = 22890818. Its totient is φ = 22890816.

The previous prime is 22890793. The next prime is 22890821. The reversal of 22890817 is 71809822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22743361 + 147456 = 4769^2 + 384^2 .

It is a cyclic number.

It is not a de Polignac number, because 22890817 - 2¹¹ = 22888769 is a prime.

It is not a weakly prime, because it can be changed into another prime (22890317) 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, 11445408 + 11445409.

It is an arithmetic number, because the mean of its divisors is an integer number (11445409).

Almost surely, 2^22890817 is an apocalyptic number.

It is an amenable number.

22890817 is a deficient number, since it is larger than the sum of its proper divisors (1).

22890817 is an equidigital number, since it uses as much as digits as its factorization.

22890817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 22890817 is about 4784.4348673589. The cubic root of 22890817 is about 283.9359812389.

The spelling of 22890817 in words is "twenty-two million, eight hundred ninety thousand, eight hundred seventeen".