Does the number of letters in Surat Nuh, 950 letters, correspond to the number of years of his life, peace be upon him?

This statement is incorrect. The age of Noah (peace be upon him) was not only 950 years, nor is that the number of letters in Surat Nuh. The Qur'an did not specify Noah's entire lifespan; rather, it mentioned that "he remained among his people for a thousand years minus fifty years," and this does not include his whole life. Scholars have differed in estimating his age; some said he lived for 1400 years, while others mentioned he lived for 1780 years.