9866243 has 2 divisors, whose sum is σ = 9866244. Its totient is φ = 9866242.

The previous prime is 9866237. The next prime is 9866261. The reversal of 9866243 is 3426689.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9866243 - 2⁶ = 9866179 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9866197 and 9866206.

It is not a weakly prime, because it can be changed into another prime (9866203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4933121 + 4933122.

It is an arithmetic number, because the mean of its divisors is an integer number (4933122).

Almost surely, 2^9866243 is an apocalyptic number.

9866243 is a deficient number, since it is larger than the sum of its proper divisors (1).

9866243 is an equidigital number, since it uses as much as digits as its factorization.

9866243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 9866243 is about 3141.0576244316. The cubic root of 9866243 is about 214.4785850609.

The spelling of 9866243 in words is "nine million, eight hundred sixty-six thousand, two hundred forty-three".