9991365443 has 16 divisors (see below), whose sum is σ = 10788111360. Its totient is φ = 9218726016.

The previous prime is 9991365431. The next prime is 9991365457. The reversal of 9991365443 is 3445631999.

It is a cyclic number.

It is not a de Polignac number, because 9991365443 - 2⁸ = 9991365187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991365413) 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 15 ways as a sum of consecutive naturals, for example, 354530 + ... + 381672.

It is an arithmetic number, because the mean of its divisors is an integer number (674256960).

Almost surely, 2^9991365443 is an apocalyptic number.

9991365443 is a deficient number, since it is larger than the sum of its proper divisors (796745917).

9991365443 is a wasteful number, since it uses less digits than its factorization.

9991365443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27586.

The product of its digits is 3149280, while the sum is 53.

The square root of 9991365443 is about 99956.8178915275. The cubic root of 9991365443 is about 2153.8144251694.

The spelling of 9991365443 in words is "nine billion, nine hundred ninety-one million, three hundred sixty-five thousand, four hundred forty-three".