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.

The number before the decimal point has a 2 in the hundreds place, a 9 in the tens place, and a 1 in the ones place.
This is written as two hundred ninety-one.

The decimal point is written as "and."

The number after the decimal point has a 4 in the tenths place, a 1 in the hundredths place, and a 3 in the thousandths place.
Since the last digit is in the thousandths place, this is written as
four hundred thirteen thousandths.

So, the number written in words is two hundred ninety-one and
four hundred thirteen thousandths.

Ninety-six is written 96.

Four hundred one is written 401.
Four hundred one thousandths is written so that the last digit is in the thousandths place, 0.401.

So, ninety-six and four hundred one thousandths written as a number is 96.401.