91338763 has 2 divisors, whose sum is σ = 91338764. Its totient is φ = 91338762.

The previous prime is 91338749. The next prime is 91338787. The reversal of 91338763 is 36783319.

It is a weak prime.

It is an emirp because it is prime and its reverse (36783319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91338763 - 2⁹ = 91338251 is a prime.

It is not a weakly prime, because it can be changed into another prime (91338703) 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, 45669381 + 45669382.

It is an arithmetic number, because the mean of its divisors is an integer number (45669382).

Almost surely, 2^91338763 is an apocalyptic number.

91338763 is a deficient number, since it is larger than the sum of its proper divisors (1).

91338763 is an equidigital number, since it uses as much as digits as its factorization.

91338763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 91338763 is about 9557.1315257247. The cubic root of 91338763 is about 450.3515984651.

The spelling of 91338763 in words is "ninety-one million, three hundred thirty-eight thousand, seven hundred sixty-three".