91416161 has 2 divisors, whose sum is σ = 91416162. Its totient is φ = 91416160.

The previous prime is 91416139. The next prime is 91416173. The reversal of 91416161 is 16161419.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91107025 + 309136 = 9545^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 91416161 - 2⁶ = 91416097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91416181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45708080 + 45708081.

It is an arithmetic number, because the mean of its divisors is an integer number (45708081).

Almost surely, 2^91416161 is an apocalyptic number.

It is an amenable number.

91416161 is a deficient number, since it is larger than the sum of its proper divisors (1).

91416161 is an equidigital number, since it uses as much as digits as its factorization.

91416161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 91416161 is about 9561.1798958078. The cubic root of 91416161 is about 450.4787678109.

The spelling of 91416161 in words is "ninety-one million, four hundred sixteen thousand, one hundred sixty-one".