91376563 has 2 divisors, whose sum is σ = 91376564. Its totient is φ = 91376562.

The previous prime is 91376557. The next prime is 91376599. The reversal of 91376563 is 36567319.

It is a weak prime.

It is an emirp because it is prime and its reverse (36567319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91376563 is a prime.

It is not a weakly prime, because it can be changed into another prime (91376063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45688281 + 45688282.

It is an arithmetic number, because the mean of its divisors is an integer number (45688282).

Almost surely, 2^91376563 is an apocalyptic number.

91376563 is a deficient number, since it is larger than the sum of its proper divisors (1).

91376563 is an equidigital number, since it uses as much as digits as its factorization.

91376563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 40.

The square root of 91376563 is about 9559.1089019845. The cubic root of 91376563 is about 450.4137150009.

The spelling of 91376563 in words is "ninety-one million, three hundred seventy-six thousand, five hundred sixty-three".