9819223 has 2 divisors, whose sum is σ = 9819224. Its totient is φ = 9819222.

The previous prime is 9819221. The next prime is 9819239. The reversal of 9819223 is 3229189.

It is a weak prime.

It is an emirp because it is prime and its reverse (3229189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9819223 - 2¹ = 9819221 is a prime.

Together with 9819221, it forms a pair of twin primes.

9819223 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9819221) 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, 4909611 + 4909612.

It is an arithmetic number, because the mean of its divisors is an integer number (4909612).

Almost surely, 2^9819223 is an apocalyptic number.

9819223 is a deficient number, since it is larger than the sum of its proper divisors (1).

9819223 is an equidigital number, since it uses as much as digits as its factorization.

9819223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 9819223 is about 3133.5639454142. The cubic root of 9819223 is about 214.1373256061.

Subtracting from 9819223 its sum of digits (34), we obtain a palindrome (9819189).

It can be divided in two parts, 98 and 19223, that added together give a square (19321 = 139²).

The spelling of 9819223 in words is "nine million, eight hundred nineteen thousand, two hundred twenty-three".