170109 has 12 divisors (see below), whose sum is σ = 252252. Its totient is φ = 110400.

The previous prime is 170101. The next prime is 170111. The reversal of 170109 is 901071.

170109 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 27225 + 142884 = 165^2 + 378^2 .

It is not a de Polignac number, because 170109 - 2³ = 170101 is a prime.

170109 is strictly pandigital in base 7.

170109 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 170091 and 170100.

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 170109.

It is not an unprimeable number, because it can be changed into a prime (170101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139 + ... + 599.

It is an arithmetic number, because the mean of its divisors is an integer number (21021).

2¹⁷⁰¹⁰⁹ is an apocalyptic number.

It is an amenable number.

170109 is a deficient number, since it is larger than the sum of its proper divisors (82143).

170109 is a wasteful number, since it uses less digits than its factorization.

170109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 505 counting only the distinct ones).

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

The square root of 170109 is about 412.4427232962. The cubic root of 170109 is about 55.4084196998.

The spelling of 170109 in words is "one hundred seventy thousand, one hundred nine".