Write the following in words according to International System of Numeration :
`123527891`

Answer

To write the number `123527891` in words according to the International System of Numeration, we will break it down into its respective place values.

### Step-by-Step Solution:

1. **Identify the Place Values**:
The number `123527891` can be divided into groups based on the International System of Numeration. The groups are:
- Millions
- Thousands
- Units

The number can be grouped as follows:
- 123 (Millions)
- 527 (Thousands)
- 891 (Units)

2. **Convert Each Group into Words**:
- The first group is `123`, which represents **One Hundred Twenty-Three Million**.
- The second group is `527`, which represents **Five Hundred Twenty-Seven Thousand**.
- The last group is `891`, which represents **Eight Hundred Ninety-One**.

3. **Combine the Words**:
Now, we combine all the words from the groups we have converted:
- One Hundred Twenty-Three Million
- Five Hundred Twenty-Seven Thousand
- Eight Hundred Ninety-One

4. **Final Answer**:
Putting it all together, the number `123527891` in words according to the International System of Numeration is:
**One Hundred Twenty-Three Million Five Hundred Twenty-Seven Thousand Eight Hundred Ninety-One**.