9913917911 has 2 divisors, whose sum is σ = 9913917912. Its totient is φ = 9913917910.

The previous prime is 9913917901. The next prime is 9913917961. The reversal of 9913917911 is 1197193199.

It is a happy number.

It is an a-pointer prime, because the next prime (9913917961) can be obtained adding 9913917911 to its sum of digits (50).

It is a weak prime.

It is an emirp because it is prime and its reverse (1197193199) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9913917911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9913917911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9913917901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956958955 + 4956958956.

It is an arithmetic number, because the mean of its divisors is an integer number (4956958956).

Almost surely, 2^9913917911 is an apocalyptic number.

9913917911 is a deficient number, since it is larger than the sum of its proper divisors (1).

9913917911 is an equidigital number, since it uses as much as digits as its factorization.

9913917911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137781, while the sum is 50.

The square root of 9913917911 is about 99568.6592809203. The cubic root of 9913917911 is about 2148.2349249388.

The spelling of 9913917911 in words is "nine billion, nine hundred thirteen million, nine hundred seventeen thousand, nine hundred eleven".