91563 has 8 divisors (see below), whose sum is σ = 127488. Its totient is φ = 58344.

The previous prime is 91541. The next prime is 91571. The reversal of 91563 is 36519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91563 - 2⁶ = 91499 is a prime.

91563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (91513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595 + ... + 732.

It is an arithmetic number, because the mean of its divisors is an integer number (15936).

2⁹¹⁵⁶³ is an apocalyptic number.

91563 is a deficient number, since it is larger than the sum of its proper divisors (35925).

91563 is a wasteful number, since it uses less digits than its factorization.

91563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its digits is 810, while the sum is 24.

The square root of 91563 is about 302.5937871140. The cubic root of 91563 is about 45.0719835566.

The spelling of 91563 in words is "ninety-one thousand, five hundred sixty-three".