9969919793 has 2 divisors, whose sum is σ = 9969919794. Its totient is φ = 9969919792.

The previous prime is 9969919789. The next prime is 9969919877. The reversal of 9969919793 is 3979199699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9715453489 + 254466304 = 98567^2 + 15952^2 .

It is an emirp because it is prime and its reverse (3979199699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9969919793 - 2² = 9969919789 is a prime.

It is not a weakly prime, because it can be changed into another prime (9969919753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984959896 + 4984959897.

It is an arithmetic number, because the mean of its divisors is an integer number (4984959897).

Almost surely, 2^9969919793 is an apocalyptic number.

It is an amenable number.

9969919793 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969919793 is an equidigital number, since it uses as much as digits as its factorization.

9969919793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66961566, while the sum is 71.

The square root of 9969919793 is about 99849.4856922158. The cubic root of 9969919793 is about 2152.2723257201.

The spelling of 9969919793 in words is "nine billion, nine hundred sixty-nine million, nine hundred nineteen thousand, seven hundred ninety-three".