91160161 has 2 divisors, whose sum is σ = 91160162. Its totient is φ = 91160160.

The previous prime is 91160131. The next prime is 91160183. The reversal of 91160161 is 16106119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79299025 + 11861136 = 8905^2 + 3444^2 .

It is an emirp because it is prime and its reverse (16106119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91160161 - 2¹¹ = 91158113 is a prime.

It is not a weakly prime, because it can be changed into another prime (91160131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45580080 + 45580081.

It is an arithmetic number, because the mean of its divisors is an integer number (45580081).

Almost surely, 2^91160161 is an apocalyptic number.

It is an amenable number.

91160161 is a deficient number, since it is larger than the sum of its proper divisors (1).

91160161 is an equidigital number, since it uses as much as digits as its factorization.

91160161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 91160161 is about 9547.7830411044. The cubic root of 91160161 is about 450.0578707467.

The spelling of 91160161 in words is "ninety-one million, one hundred sixty thousand, one hundred sixty-one".