91448663 has 2 divisors, whose sum is σ = 91448664. Its totient is φ = 91448662.

The previous prime is 91448647. The next prime is 91448671. The reversal of 91448663 is 36684419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91448663 - 2⁴ = 91448647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91448663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91448263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45724331 + 45724332.

It is an arithmetic number, because the mean of its divisors is an integer number (45724332).

Almost surely, 2^91448663 is an apocalyptic number.

91448663 is a deficient number, since it is larger than the sum of its proper divisors (1).

91448663 is an equidigital number, since it uses as much as digits as its factorization.

91448663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 91448663 is about 9562.8794303808. The cubic root of 91448663 is about 450.5321490581.

The spelling of 91448663 in words is "ninety-one million, four hundred forty-eight thousand, six hundred sixty-three".