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79 in words

79

seventy-nine

79 is written seventy-nine.

Ways to write it

As an ordinal: seventy-ninth
Roman numeral: LXXIX
Expanded form: 70 + 9

Place value

Place	Digit	Value
tens	7	70
ones	9	9

Number facts

Even or odd: Odd
Prime or composite: Prime
Factors: 1 and 79 (2 factors)
First 10 multiples: 79, 158, 237, 316, 395, 474, 553, 632, 711, 790
Square: 79 × 79 = 6,241
Square root: ≈ 8.89
Sum of the digits: 7 + 9 = 16
Rounded to the nearest 10: 80
Number before: 78
Number after: 80
In binary: 1001111

Quick check

What number comes just after 79?
Show the answer
80
Is 79 even or odd?
Show the answer
Odd
What is 79 + 10?
Show the answer
89

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Frequently asked questions

How do you write 79 in words?

79 is written "seventy-nine".

Is 79 a prime number?

Yes. 79 is a prime number: its only factors are 1 and 79.

What are the factors of 79?

The factors of 79 are 1 and 79.

How do you write 79 in Roman numerals?

79 in Roman numerals is LXXIX.