9113891 has 2 divisors, whose sum is σ = 9113892. Its totient is φ = 9113890.

The previous prime is 9113879. The next prime is 9113899. The reversal of 9113891 is 1983119.

9113891 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9113891 is a prime.

It is not a weakly prime, because it can be changed into another prime (9113899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4556945 + 4556946.

It is an arithmetic number, because the mean of its divisors is an integer number (4556946).

Almost surely, 2^9113891 is an apocalyptic number.

9113891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9113891 is an equidigital number, since it uses as much as digits as its factorization.

9113891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 32.

The square root of 9113891 is about 3018.9221586520. The cubic root of 9113891 is about 208.8821248732.

The spelling of 9113891 in words is "nine million, one hundred thirteen thousand, eight hundred ninety-one".