9889899 has 32 divisors (see below), whose sum is σ = 14899200. Its totient is φ = 5806080.

The previous prime is 9889889. The next prime is 9889909. The reversal of 9889899 is 9989889.

It is an interprime number because it is at equal distance from previous prime (9889889) and next prime (9889909).

It is not a de Polignac number, because 9889899 - 2¹¹ = 9887851 is a prime.

9889899 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9889849) 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 in 31 ways as a sum of consecutive naturals, for example, 51147 + ... + 51339.

It is an arithmetic number, because the mean of its divisors is an integer number (465600).

Almost surely, 2^9889899 is an apocalyptic number.

9889899 is a deficient number, since it is larger than the sum of its proper divisors (5009301).

9889899 is a wasteful number, since it uses less digits than its factorization.

9889899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

The product of its digits is 3359232, while the sum is 60.

The square root of 9889899 is about 3144.8209805965. The cubic root of 9889899 is about 214.6498645702.

The spelling of 9889899 in words is "nine million, eight hundred eighty-nine thousand, eight hundred ninety-nine".