91863 has 12 divisors (see below), whose sum is σ = 135720. Its totient is φ = 59856.

The previous prime is 91841. The next prime is 91867. The reversal of 91863 is 36819.

It is not a de Polignac number, because 91863 - 2¹² = 87767 is a prime.

It is a d-powerful number, because it can be written as 9 + 1 + 8⁵ + 6² + 3¹⁰ .

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91863.

It is not an unprimeable number, because it can be changed into a prime (91867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445 + ... + 617.

It is an arithmetic number, because the mean of its divisors is an integer number (11310).

2⁹¹⁸⁶³ is an apocalyptic number.

91863 is a deficient number, since it is larger than the sum of its proper divisors (43857).

91863 is a wasteful number, since it uses less digits than its factorization.

91863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 235 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 91863 is about 303.0890958118. The cubic root of 91863 is about 45.1211549991.

The spelling of 91863 in words is "ninety-one thousand, eight hundred sixty-three".