9999868 has 6 divisors (see below), whose sum is σ = 17499776. Its totient is φ = 4999932.

The previous prime is 9999863. The next prime is 9999877. The reversal of 9999868 is 8689999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999863) 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, 1249980 + ... + 1249987.

Almost surely, 2^9999868 is an apocalyptic number.

It is an amenable number.

9999868 is a deficient number, since it is larger than the sum of its proper divisors (7499908).

9999868 is a wasteful number, since it uses less digits than its factorization.

9999868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499971 (or 2499969 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 58.

The square root of 9999868 is about 3162.2567890669. The cubic root of 9999868 is about 215.4425210478.

The spelling of 9999868 in words is "nine million, nine hundred ninety-nine thousand, eight hundred sixty-eight".