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89 in words

89

eighty-nine

89 is written eighty-nine.

Ways to write it

As an ordinal: eighty-ninth
Roman numeral: LXXXIX
Expanded form: 80 + 9

Place value

Place	Digit	Value
tens	8	80
ones	9	9

Number facts

Even or odd: Odd
Prime or composite: Prime
Factors: 1 and 89 (2 factors)
First 10 multiples: 89, 178, 267, 356, 445, 534, 623, 712, 801, 890
Square: 89 × 89 = 7,921
Square root: ≈ 9.43
Sum of the digits: 8 + 9 = 17
Rounded to the nearest 10: 90
Number before: 88
Number after: 90
In binary: 1011001

Quick check

What number comes just after 89?
Show the answer
90
Is 89 even or odd?
Show the answer
Odd
What is 89 + 10?
Show the answer
99

Practise with a game

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Frequently asked questions

How do you write 89 in words?

89 is written "eighty-nine".

Is 89 a prime number?

Yes. 89 is a prime number: its only factors are 1 and 89.

What are the factors of 89?

The factors of 89 are 1 and 89.

How do you write 89 in Roman numerals?

89 in Roman numerals is LXXXIX.