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289

289 is a natural number that follows 288 and precedes 290. It is the square of the prime number 17, making it a composite number and a square number.

In mathematics, 289 equals 17 squared (17^2). Its divisors are 1, 17, and 289. It can be

In practical use, 289 appears in telecommunications as part of the North American Numbering Plan: the 289

Historically, the year 289 CE falls in the late Roman Empire period, during the broader era known

Overall, 289 is primarily notable for its mathematical properties as a prime square and its occasional use

expressed
as
a
sum
of
two
squares,
for
example
8^2
+
15^2
=
289,
as
well
as
17^2
+
0^2.
In
common
base
representations,
289
is
100100001
in
binary
and
0x121
in
hexadecimal.
It
is
the
17th
square
number,
with
256
(16^2)
and
324
(18^2)
as
its
neighboring
squares.
area
code
serves
parts
of
southern
Ontario,
Canada,
as
an
overlay
for
the
905
region.
This
means
some
telephone
numbers
in
the
area
use
the
289
code
in
addition
to
other
overlapping
codes.
as
the
Crisis
of
the
Third
Century.
While
specific
events
of
that
year
are
not
widely
singled
out
in
general
reference
works,
it
is
part
of
the
sequence
of
years
that
characterized
this
turbulent
phase
of
Roman
history.
as
an
identifier
in
modern
numbering
systems,
such
as
area
codes.