9888899 has 4 divisors (see below), whose sum is σ = 10075536. Its totient is φ = 9702264.

The previous prime is 9888889. The next prime is 9888929. The reversal of 9888899 is 9988889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9988889 = 19 ⋅525731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9888899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9888889) 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 3 ways as a sum of consecutive naturals, for example, 93239 + ... + 93344.

It is an arithmetic number, because the mean of its divisors is an integer number (2518884).

Almost surely, 2^9888899 is an apocalyptic number.

9888899 is a deficient number, since it is larger than the sum of its proper divisors (186637).

9888899 is a wasteful number, since it uses less digits than its factorization.

9888899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186636.

The product of its digits is 2985984, while the sum is 59.

The square root of 9888899 is about 3144.6619850152. The cubic root of 9888899 is about 214.6426296766.

The spelling of 9888899 in words is "nine million, eight hundred eighty-eight thousand, eight hundred ninety-nine".