91063863 has 24 divisors (see below), whose sum is σ = 146555136. Its totient is φ = 54013200.

The previous prime is 91063837. The next prime is 91063867. The reversal of 91063863 is 36836019.

It is a happy number.

91063863 is a `hidden beast` number, since 9 + 10 + 638 + 6 + 3 = 666.

It is not a de Polignac number, because 91063863 - 2⁸ = 91063607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91063867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5133 + ... + 14438.

It is an arithmetic number, because the mean of its divisors is an integer number (6106464).

Almost surely, 2^91063863 is an apocalyptic number.

91063863 is a deficient number, since it is larger than the sum of its proper divisors (55491273).

91063863 is a wasteful number, since it uses less digits than its factorization.

91063863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19635 (or 19632 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 91063863 is about 9542.7387578200. The cubic root of 91063863 is about 449.8993404483.

The spelling of 91063863 in words is "ninety-one million, sixty-three thousand, eight hundred sixty-three".