9891023323 has 4 divisors (see below), whose sum is σ = 9918575280. Its totient is φ = 9863471368.

The previous prime is 9891023281. The next prime is 9891023327. The reversal of 9891023323 is 3233201989.

It is a happy number.

9891023323 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 9891023323 - 2¹⁷ = 9890892251 is a prime.

It is a super-2 number, since 2×9891023323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9891023327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13775440 + ... + 13776157.

It is an arithmetic number, because the mean of its divisors is an integer number (2479643820).

Almost surely, 2^9891023323 is an apocalyptic number.

9891023323 is a deficient number, since it is larger than the sum of its proper divisors (27551957).

9891023323 is a wasteful number, since it uses less digits than its factorization.

9891023323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27551956.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 9891023323 is about 99453.6239812306. The cubic root of 9891023323 is about 2146.5799834499.

The spelling of 9891023323 in words is "nine billion, eight hundred ninety-one million, twenty-three thousand, three hundred twenty-three".