9091911110917 has 2 divisors, whose sum is σ = 9091911110918. Its totient is φ = 9091911110916.

The previous prime is 9091911110879. The next prime is 9091911110981. The reversal of 9091911110917 is 7190111191909.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9051427256481 + 40483854436 = 3008559^2 + 201206^2 .

It is a cyclic number.

It is not a de Polignac number, because 9091911110917 - 2¹⁵ = 9091911078149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9091911110987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545955555458 + 4545955555459.

It is an arithmetic number, because the mean of its divisors is an integer number (4545955555459).

Almost surely, 2^{9091911110917} is an apocalyptic number.

It is an amenable number.

9091911110917 is a deficient number, since it is larger than the sum of its proper divisors (1).

9091911110917 is an equidigital number, since it uses as much as digits as its factorization.

9091911110917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 49.

The spelling of 9091911110917 in words is "nine trillion, ninety-one billion, nine hundred eleven million, one hundred ten thousand, nine hundred seventeen".