170989 has 8 divisors (see below), whose sum is σ = 210560. Its totient is φ = 135216.

The previous prime is 170971. The next prime is 171007. The reversal of 170989 is 989071.

It is an interprime number because it is at equal distance from previous prime (170971) and next prime (171007).

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

It is a cyclic number.

It is not a de Polignac number, because 170989 - 2⁵ = 170957 is a prime.

170989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849 + ... + 1030.

It is an arithmetic number, because the mean of its divisors is an integer number (26320).

2¹⁷⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

170989 is a deficient number, since it is larger than the sum of its proper divisors (39571).

170989 is a wasteful number, since it uses less digits than its factorization.

170989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

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

The square root of 170989 is about 413.5081619509. The cubic root of 170989 is about 55.5038008381.

The spelling of 170989 in words is "one hundred seventy thousand, nine hundred eighty-nine".