9989769523 has 2 divisors, whose sum is σ = 9989769524. Its totient is φ = 9989769522.

The previous prime is 9989769497. The next prime is 9989769529. The reversal of 9989769523 is 3259679899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9989769523 - 2²¹ = 9987672371 is a prime.

It is not a weakly prime, because it can be changed into another prime (9989769529) 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, 4994884761 + 4994884762.

It is an arithmetic number, because the mean of its divisors is an integer number (4994884762).

Almost surely, 2^9989769523 is an apocalyptic number.

9989769523 is a deficient number, since it is larger than the sum of its proper divisors (1).

9989769523 is an equidigital number, since it uses as much as digits as its factorization.

9989769523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66134880, while the sum is 67.

The square root of 9989769523 is about 99948.8345254711. The cubic root of 9989769523 is about 2153.6997428614.

The spelling of 9989769523 in words is "nine billion, nine hundred eighty-nine million, seven hundred sixty-nine thousand, five hundred twenty-three".