91853 has 4 divisors (see below), whose sum is σ = 94848. Its totient is φ = 88860.

The previous prime is 91841. The next prime is 91867. The reversal of 91853 is 35819.

91853 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91853 - 2⁴ = 91837 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 3, base 9, base 14 and base 16.

It is a zygodrome in base 3.

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 91853.

It is not an unprimeable number, because it can be changed into a prime (91813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451 + ... + 1512.

It is an arithmetic number, because the mean of its divisors is an integer number (23712).

91853 is a Friedman number, since it can be written as (9+5)*3^8-1, using all its digits and the basic arithmetic operations.

2⁹¹⁸⁵³ is an apocalyptic number.

It is an amenable number.

91853 is a deficient number, since it is larger than the sum of its proper divisors (2995).

91853 is a wasteful number, since it uses less digits than its factorization.

91853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994.

The product of its digits is 1080, while the sum is 26.

The square root of 91853 is about 303.0725985634. The cubic root of 91853 is about 45.1195176771.

The spelling of 91853 in words is "ninety-one thousand, eight hundred fifty-three".