The number has a 3 in the ten thousands place, which is written as
thirty thousand.

The number has a 7 in the thousands place, which is written as
seven thousand.

The number has a 4 in the hundreds place, which is written as
four hundred.

The number has a 1 in the tens place and a 9 in the ones place, which is written as nineteen.

In the number, there is a comma between the thousands and hundreds places.
So, put a comma between "thirty-seven thousand" and "four hundred."

The number written in words is thirty-seven thousand, four hundred nineteen.

First, identify which digit is in each place.

thousands	2
hundreds	9
tens	4
ones	6

Then, write the digits as a number.
Put a comma every three digits, starting from the ones place and moving left.

Compare the digits in each place from left to right.
Start with the hundred thousands place.

The digits in the hundred thousands place are equal, so compare the digits in the ten thousands place.

The digits in the ten thousands place are equal, so compare the digits in the thousands place.

The digits in the thousands place are equal, so compare the digits in the hundreds place.

The digits in the hundreds place are equal, so compare the digits in the tens place.

The digits in the tens place are equal, so compare the digits in the ones place.

Since 2 < 3, 612,242 < 612,243.

First, compare the digits in the thousands place of each number.
The numbers all have a 4 in the thousands place, so compare the digits in the hundreds place of each number.

Since 1 < 6, 4,186 and 4,168 are less than 4,618 and 4,681.

Next, compare the digits in the tens places of 4,186 and 4,168.

Since 6 < 8, 4,168 < 4,186.

Then, compare the digits in the tens places of 4,618 and 4,681.

Since 1 < 8, 4,618 < 4,681.

So, the numbers in order from least to greatest are
4,168, 4,186, 4,618, 4,681, and the numbers in order from greatest to least are 4,681, 4,618, 4,186, 4,168.