Sum of digits in a very large prime number.

By listing the first six prime numbers: 2,3,5,7,11,2, 3, 5, 7, 11, and 1313, we can see that the 6th prime is 13.

Let NN be the sum of the digits of a prime (11 would be 2).

What is the value of NN for the 148937st148937st prime number?

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