9218393 has 2 divisors, whose sum is σ = 9218394. Its totient is φ = 9218392.

The previous prime is 9218389. The next prime is 9218441. The reversal of 9218393 is 3938129.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7333264 + 1885129 = 2708^2 + 1373^2 .

It is a cyclic number.

It is not a de Polignac number, because 9218393 - 2² = 9218389 is a prime.

It is a super-3 number, since 3×9218393³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9218303) 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, 4609196 + 4609197.

It is an arithmetic number, because the mean of its divisors is an integer number (4609197).

Almost surely, 2^9218393 is an apocalyptic number.

It is an amenable number.

9218393 is a deficient number, since it is larger than the sum of its proper divisors (1).

9218393 is an equidigital number, since it uses as much as digits as its factorization.

9218393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 9218393 is about 3036.1806599740. The cubic root of 9218393 is about 209.6774564772.

The spelling of 9218393 in words is "nine million, two hundred eighteen thousand, three hundred ninety-three".