170018 has 4 divisors (see below), whose sum is σ = 255030. Its totient is φ = 85008.

The previous prime is 170003. The next prime is 170021. The reversal of 170018 is 810071.

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

It can be written as a sum of positive squares in only one way, i.e., 142129 + 27889 = 377^2 + 167^2 .

It is a super-2 number, since 2×170018² = 57812240648, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 169978 and 170005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42503 + ... + 42506.

2¹⁷⁰⁰¹⁸ is an apocalyptic number.

170018 is a deficient number, since it is larger than the sum of its proper divisors (85012).

170018 is an equidigital number, since it uses as much as digits as its factorization.

170018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85011.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 170018 is about 412.3323901902. The cubic root of 170018 is about 55.3985376720.

Adding to 170018 its reverse (810071), we get a palindrome (980089).

The spelling of 170018 in words is "one hundred seventy thousand, eighteen".