91535 has 4 divisors (see below), whose sum is σ = 109848. Its totient is φ = 73224.

The previous prime is 91529. The next prime is 91541. The reversal of 91535 is 53519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53519 = 109 ⋅491.

It is an interprime number because it is at equal distance from previous prime (91529) and next prime (91541).

It is a cyclic number.

It is not a de Polignac number, because 91535 - 2¹⁰ = 90511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9149 + ... + 9158.

It is an arithmetic number, because the mean of its divisors is an integer number (27462).

2⁹¹⁵³⁵ is an apocalyptic number.

91535 is a deficient number, since it is larger than the sum of its proper divisors (18313).

91535 is a wasteful number, since it uses less digits than its factorization.

91535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18312.

The product of its digits is 675, while the sum is 23.

The square root of 91535 is about 302.5475169292. The cubic root of 91535 is about 45.0673887450.

It can be divided in two parts, 91 and 535, that added together give a palindrome (626).

The spelling of 91535 in words is "ninety-one thousand, five hundred thirty-five".