170998 has 8 divisors (see below), whose sum is σ = 258408. Its totient is φ = 84864.

The previous prime is 170971. The next prime is 171007. The reversal of 170998 is 899071.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

170998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165 + ... + 607.

It is an arithmetic number, because the mean of its divisors is an integer number (32301).

2¹⁷⁰⁹⁹⁸ is an apocalyptic number.

170998 is a deficient number, since it is larger than the sum of its proper divisors (87410).

170998 is a wasteful number, since it uses less digits than its factorization.

170998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 170998 is about 413.5190443015. The cubic root of 170998 is about 55.5047746345.

The spelling of 170998 in words is "one hundred seventy thousand, nine hundred ninety-eight".