9889766923 has 2 divisors, whose sum is σ = 9889766924. Its totient is φ = 9889766922.

The previous prime is 9889766899. The next prime is 9889766927. The reversal of 9889766923 is 3296679889.

It is a strong prime.

It is an emirp because it is prime and its reverse (3296679889) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9889766923 - 2²⁹ = 9352896011 is a prime.

It is not a weakly prime, because it can be changed into another prime (9889766927) 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 as a sum of consecutive naturals, namely, 4944883461 + 4944883462.

It is an arithmetic number, because the mean of its divisors is an integer number (4944883462).

Almost surely, 2^9889766923 is an apocalyptic number.

9889766923 is a deficient number, since it is larger than the sum of its proper divisors (1).

9889766923 is an equidigital number, since it uses as much as digits as its factorization.

9889766923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70543872, while the sum is 67.

The square root of 9889766923 is about 99447.3072687240. The cubic root of 9889766923 is about 2146.4890903507.

The spelling of 9889766923 in words is "nine billion, eight hundred eighty-nine million, seven hundred sixty-six thousand, nine hundred twenty-three".