91337963 has 2 divisors, whose sum is σ = 91337964. Its totient is φ = 91337962.

The previous prime is 91337947. The next prime is 91337969. The reversal of 91337963 is 36973319.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91337963 - 2⁴ = 91337947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91337963.

It is not a weakly prime, because it can be changed into another prime (91337969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45668981 + 45668982.

It is an arithmetic number, because the mean of its divisors is an integer number (45668982).

Almost surely, 2^91337963 is an apocalyptic number.

91337963 is a deficient number, since it is larger than the sum of its proper divisors (1).

91337963 is an equidigital number, since it uses as much as digits as its factorization.

91337963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 41.

The square root of 91337963 is about 9557.0896720707. The cubic root of 91337963 is about 450.3502836442.

The spelling of 91337963 in words is "ninety-one million, three hundred thirty-seven thousand, nine hundred sixty-three".