9911081 has 2 divisors, whose sum is σ = 9911082. Its totient is φ = 9911080.

The previous prime is 9911063. The next prime is 9911087. The reversal of 9911081 is 1801199.

9911081 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5331481 + 4579600 = 2309^2 + 2140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9911081 is a prime.

It is a super-3 number, since 3×9911081³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₆₅₉₁₁₇ and since 9911081 and 659117 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (9911087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4955540 + 4955541.

It is an arithmetic number, because the mean of its divisors is an integer number (4955541).

Almost surely, 2^9911081 is an apocalyptic number.

It is an amenable number.

9911081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9911081 is an equidigital number, since it uses as much as digits as its factorization.

9911081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 9911081 is about 3148.1869385410. The cubic root of 9911081 is about 214.8029996449.

The spelling of 9911081 in words is "nine million, nine hundred eleven thousand, eighty-one".