91843 has 4 divisors (see below), whose sum is σ = 95040. Its totient is φ = 88648.

The previous prime is 91841. The next prime is 91867. The reversal of 91843 is 34819.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91843 - 2¹ = 91841 is a prime.

It is a d-powerful number, because it can be written as 9 + 1 + 8⁵ + 4² + 3¹⁰ .

It is a Duffinian number.

91843 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (91841) 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, 1555 + ... + 1612.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2⁹¹⁸⁴³ is an apocalyptic number.

91843 is a deficient number, since it is larger than the sum of its proper divisors (3197).

91843 is a wasteful number, since it uses less digits than its factorization.

91843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196.

The product of its digits is 864, while the sum is 25.

The square root of 91843 is about 303.0561004171. The cubic root of 91843 is about 45.1178802363.

It can be divided in two parts, 918 and 43, that added together give a square (961 = 31²).

The spelling of 91843 in words is "ninety-one thousand, eight hundred forty-three".