91383563 has 2 divisors, whose sum is σ = 91383564. Its totient is φ = 91383562.

The previous prime is 91383533. The next prime is 91383571. The reversal of 91383563 is 36538319.

It is a strong prime.

It is an emirp because it is prime and its reverse (36538319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91383563 - 2¹² = 91379467 is a prime.

It is not a weakly prime, because it can be changed into another prime (91383503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45691781 + 45691782.

It is an arithmetic number, because the mean of its divisors is an integer number (45691782).

Almost surely, 2^91383563 is an apocalyptic number.

91383563 is a deficient number, since it is larger than the sum of its proper divisors (1).

91383563 is an equidigital number, since it uses as much as digits as its factorization.

91383563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 91383563 is about 9559.4750378878. The cubic root of 91383563 is about 450.4252161831.

The spelling of 91383563 in words is "ninety-one million, three hundred eighty-three thousand, five hundred sixty-three".