91101161 has 2 divisors, whose sum is σ = 91101162. Its totient is φ = 91101160.

The previous prime is 91101119. The next prime is 91101163. The reversal of 91101161 is 16110119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91087936 + 13225 = 9544^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 91101161 - 2¹⁸ = 90839017 is a prime.

It is a Sophie Germain prime.

Together with 91101163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91101163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45550580 + 45550581.

It is an arithmetic number, because the mean of its divisors is an integer number (45550581).

Almost surely, 2^91101161 is an apocalyptic number.

It is an amenable number.

91101161 is a deficient number, since it is larger than the sum of its proper divisors (1).

91101161 is an equidigital number, since it uses as much as digits as its factorization.

91101161 is an evil number, because the sum of its binary digits is even.

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

The square root of 91101161 is about 9544.6928185249. The cubic root of 91101161 is about 449.9607554253.

The spelling of 91101161 in words is "ninety-one million, one hundred one thousand, one hundred sixty-one".