9111161 has 2 divisors, whose sum is σ = 9111162. Its totient is φ = 9111160.

The previous prime is 9111103. The next prime is 9111163. The reversal of 9111161 is 1611119.

9111161 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., 5382400 + 3728761 = 2320^2 + 1931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9111161 is a prime.

Together with 9111163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9111163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555580 + 4555581.

It is an arithmetic number, because the mean of its divisors is an integer number (4555581).

Almost surely, 2^9111161 is an apocalyptic number.

It is an amenable number.

9111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9111161 is an equidigital number, since it uses as much as digits as its factorization.

9111161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 20.

The square root of 9111161 is about 3018.4699766604. The cubic root of 9111161 is about 208.8612664148.

The spelling of 9111161 in words is "nine million, one hundred eleven thousand, one hundred sixty-one".