9988133 has 4 divisors (see below), whose sum is σ = 10231788. Its totient is φ = 9744480.

The previous prime is 9988127. The next prime is 9988157. The reversal of 9988133 is 3318899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3602404 + 6385729 = 1898^2 + 2527^2 .

It is a cyclic number.

It is not a de Polignac number, because 9988133 - 2⁸ = 9987877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 243613 = 9988133 / (9 + 9 + 8 + 8 + 1 + 3 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121766 + ... + 121847.

It is an arithmetic number, because the mean of its divisors is an integer number (2557947).

Almost surely, 2^9988133 is an apocalyptic number.

It is an amenable number.

9988133 is a deficient number, since it is larger than the sum of its proper divisors (243655).

9988133 is a wasteful number, since it uses less digits than its factorization.

9988133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243654.

The product of its digits is 46656, while the sum is 41.

The square root of 9988133 is about 3160.4007657258. The cubic root of 9988133 is about 215.3582130150.

The spelling of 9988133 in words is "nine million, nine hundred eighty-eight thousand, one hundred thirty-three".