9909705719 has 2 divisors, whose sum is σ = 9909705720. Its totient is φ = 9909705718.

The previous prime is 9909705709. The next prime is 9909705749. The reversal of 9909705719 is 9175079099.

It is a weak prime.

It is an emirp because it is prime and its reverse (9175079099) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9909705719 is a prime.

It is a super-2 number, since 2×9909705719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9909705709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4954852859 + 4954852860.

It is an arithmetic number, because the mean of its divisors is an integer number (4954852860).

Almost surely, 2^9909705719 is an apocalyptic number.

9909705719 is a deficient number, since it is larger than the sum of its proper divisors (1).

9909705719 is an equidigital number, since it uses as much as digits as its factorization.

9909705719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1607445, while the sum is 56.

The square root of 9909705719 is about 99547.5048356311. The cubic root of 9909705719 is about 2147.9306369036.

The spelling of 9909705719 in words is "nine billion, nine hundred nine million, seven hundred five thousand, seven hundred nineteen".