170091 has 6 divisors (see below), whose sum is σ = 245700. Its totient is φ = 113388.

The previous prime is 170081. The next prime is 170099. The reversal of 170091 is 190071.

170091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 170091 - 2¹⁰ = 169067 is a prime.

170091 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 170091.

It is not an unprimeable number, because it can be changed into a prime (170099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9441 + ... + 9458.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2¹⁷⁰⁰⁹¹ is an apocalyptic number.

170091 is a deficient number, since it is larger than the sum of its proper divisors (75609).

170091 is a wasteful number, since it uses less digits than its factorization.

170091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18905 (or 18902 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 18.

The square root of 170091 is about 412.4209015072. The cubic root of 170091 is about 55.4064652926.

The spelling of 170091 in words is "one hundred seventy thousand, ninety-one".