9991868233 has 8 divisors (see below), whose sum is σ = 10023118848. Its totient is φ = 9960640224.

The previous prime is 9991868231. The next prime is 9991868281. The reversal of 9991868233 is 3328681999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9991868233 - 2¹ = 9991868231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991868231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403160 + ... + 1410262.

It is an arithmetic number, because the mean of its divisors is an integer number (1252889856).

Almost surely, 2^9991868233 is an apocalyptic number.

It is an amenable number.

9991868233 is a deficient number, since it is larger than the sum of its proper divisors (31250615).

9991868233 is a wasteful number, since it uses less digits than its factorization.

9991868233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11303.

The product of its digits is 5038848, while the sum is 58.

The square root of 9991868233 is about 99959.3328959332. The cubic root of 9991868233 is about 2153.8505529705.

The spelling of 9991868233 in words is "nine billion, nine hundred ninety-one million, eight hundred sixty-eight thousand, two hundred thirty-three".