22303993 has 2 divisors, whose sum is σ = 22303994. Its totient is φ = 22303992.

The previous prime is 22303943. The next prime is 22304027. The reversal of 22303993 is 39930322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12588304 + 9715689 = 3548^2 + 3117^2 .

It is a cyclic number.

It is not a de Polignac number, because 22303993 - 2⁹ = 22303481 is a prime.

It is not a weakly prime, because it can be changed into another prime (22303943) 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, 11151996 + 11151997.

It is an arithmetic number, because the mean of its divisors is an integer number (11151997).

Almost surely, 2^22303993 is an apocalyptic number.

It is an amenable number.

22303993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22303993 is an equidigital number, since it uses as much as digits as its factorization.

22303993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 22303993 is about 4722.7103447067. The cubic root of 22303993 is about 281.4886403866.

The spelling of 22303993 in words is "twenty-two million, three hundred three thousand, nine hundred ninety-three".