9999243 has 12 divisors (see below), whose sum is σ = 14549080. Its totient is φ = 6617376.

The previous prime is 9999233. The next prime is 9999271. The reversal of 9999243 is 3429999.

It is not a de Polignac number, because 9999243 - 2¹² = 9995147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999233) 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 in 11 ways as a sum of consecutive naturals, for example, 2746 + ... + 5247.

Almost surely, 2^9999243 is an apocalyptic number.

9999243 is a deficient number, since it is larger than the sum of its proper divisors (4549837).

9999243 is a wasteful number, since it uses less digits than its factorization.

9999243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8138 (or 8135 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 9999243 is about 3162.1579656937. The cubic root of 9999243 is about 215.4380325091.

The spelling of 9999243 in words is "nine million, nine hundred ninety-nine thousand, two hundred forty-three".