9861223 has 2 divisors, whose sum is σ = 9861224. Its totient is φ = 9861222.

The previous prime is 9861221. The next prime is 9861239. The reversal of 9861223 is 3221689.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9861223 - 2¹ = 9861221 is a prime.

Together with 9861221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9861221) 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, 4930611 + 4930612.

It is an arithmetic number, because the mean of its divisors is an integer number (4930612).

Almost surely, 2^9861223 is an apocalyptic number.

9861223 is a deficient number, since it is larger than the sum of its proper divisors (1).

9861223 is an equidigital number, since it uses as much as digits as its factorization.

9861223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 9861223 is about 3140.2584288558. The cubic root of 9861223 is about 214.4422029191.

It can be divided in two parts, 986 and 1223, that added together give a square (2209 = 47²).

The spelling of 9861223 in words is "nine million, eight hundred sixty-one thousand, two hundred twenty-three".