91705 has 4 divisors (see below), whose sum is σ = 110052.
Its totient is φ = 73360.
The previous prime is 91703. The next prime is 91711. The reversal of 91705 is 50719.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50719 = 67 ⋅757.
It can be written as a sum of positive squares in 2 ways, for example, as 19881 + 71824 = 141^2 + 268^2
It is not a de Polignac number, because 91705 - 21 = 91703 is a prime.
It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (91703) 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, 9166 + ... + 9175.
It is an arithmetic number, because the mean of its divisors is an integer number (27513).
291705 is an apocalyptic number.
It is an amenable number.
91705 is a deficient number, since it is larger than the sum of its proper divisors (18347).
91705 is a wasteful number, since it uses less digits than its factorization.
91705 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 18346.
The product of its (nonzero) digits is 315, while the sum is 22.
The square root of 91705 is about 302.8283342093.
The cubic root of 91705 is about 45.0952714056.
The spelling of 91705 in words is "ninety-one thousand, seven hundred five".