170 in words
170
one hundred and seventy
170 is written one hundred and seventy.
Ways to write it
- As an ordinal
- one hundred and seventieth
- Roman numeral
- CLXX
- Expanded form
- 100 + 70
Place value
| Place | Digit | Value |
|---|---|---|
| hundreds | 1 | 100 |
| tens | 7 | 70 |
| ones | 0 | 0 |
Number facts
- Even or odd
- Even
- Prime or composite
- Composite
- Factors
- 1, 2, 5, 10, 17, 34, 85 and 170 (8 factors)
- First 10 multiples
- 170, 340, 510, 680, 850, 1,020, 1,190, 1,360, 1,530, 1,700
- Square
- 170 × 170 = 28,900
- Square root
- ≈ 13.04
- Sum of the digits
- 1 + 7 + 0 = 8
- Rounded to the nearest 10
- 170
- Rounded to the nearest 100
- 200
- Number before
- 169
- Number after
- 171
- In binary
10101010
Quick check
What number comes just after 170?
Show the answer
171
Is 170 even or odd?
Show the answer
Even
What is 170 + 10?
Show the answer
180
Practise with a game
Factors, Multiples & Primes
Multiples, factors, prime numbers, square numbers and prime factors.
Roman Numerals
Read and write Roman numerals from I to 3,999.Frequently asked questions
How do you write 170 in words?
170 is written "one hundred and seventy".
Is 170 a prime number?
No. 170 is a composite number, because it has more than two factors.
What are the factors of 170?
The factors of 170 are 1, 2, 5, 10, 17, 34, 85 and 170.
How do you write 170 in Roman numerals?
170 in Roman numerals is CLXX.