Scientific notation is expressed in the form of a× 10 n, where 1 ≤| a | < 10, and n is an integer. Determining the value of n is an error-prone point. Since 1370536875 has 10, it can be determined that n = 65438.
The number of significant digits is calculated by starting with the first digit on the left that is not 0, and all subsequent digits are significant digits.
The number of significant digits represented by scientific notation is only related to the preceding a, and has nothing to do with the power of 10.
Solution:1370536875 =1.370536875×109 ≈1.37×109.
So choose: C.