9991310323 has 4 divisors (see below), whose sum is σ = 10313610688. Its totient is φ = 9669009960.

The previous prime is 9991310321. The next prime is 9991310333. The reversal of 9991310323 is 3230131999.

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

It is a cyclic number.

It is not a de Polignac number, because 9991310323 - 2¹ = 9991310321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991310321) 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 3 ways as a sum of consecutive naturals, for example, 161150136 + ... + 161150197.

It is an arithmetic number, because the mean of its divisors is an integer number (2578402672).

Almost surely, 2^9991310323 is an apocalyptic number.

9991310323 is a deficient number, since it is larger than the sum of its proper divisors (322300365).

9991310323 is a wasteful number, since it uses less digits than its factorization.

9991310323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322300364.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 9991310323 is about 99956.5421720860. The cubic root of 9991310323 is about 2153.8104644672.

The spelling of 9991310323 in words is "nine billion, nine hundred ninety-one million, three hundred ten thousand, three hundred twenty-three".