91328663 has 2 divisors, whose sum is σ = 91328664. Its totient is φ = 91328662.

The previous prime is 91328647. The next prime is 91328681. The reversal of 91328663 is 36682319.

It is a weak prime.

It is an emirp because it is prime and its reverse (36682319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91328663 - 2⁴ = 91328647 is a prime.

It is a Sophie Germain prime.

It is equal to p_5289653 and since 91328663 and 5289653 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91322663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45664331 + 45664332.

It is an arithmetic number, because the mean of its divisors is an integer number (45664332).

Almost surely, 2^91328663 is an apocalyptic number.

91328663 is a deficient number, since it is larger than the sum of its proper divisors (1).

91328663 is an equidigital number, since it uses as much as digits as its factorization.

91328663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 91328663 is about 9556.6031098921. The cubic root of 91328663 is about 450.3349982884.

The spelling of 91328663 in words is "ninety-one million, three hundred twenty-eight thousand, six hundred sixty-three".