91116187 has 2 divisors, whose sum is σ = 91116188. Its totient is φ = 91116186.

The previous prime is 91116167. The next prime is 91116197. The reversal of 91116187 is 78161119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91116187 - 2⁷ = 91116059 is a prime.

It is not a weakly prime, because it can be changed into another prime (91116167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45558093 + 45558094.

It is an arithmetic number, because the mean of its divisors is an integer number (45558094).

Almost surely, 2^91116187 is an apocalyptic number.

91116187 is a deficient number, since it is larger than the sum of its proper divisors (1).

91116187 is an equidigital number, since it uses as much as digits as its factorization.

91116187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 34.

The square root of 91116187 is about 9545.4799250745. The cubic root of 91116187 is about 449.9854925364.

The spelling of 91116187 in words is "ninety-one million, one hundred sixteen thousand, one hundred eighty-seven".