The number 199 is the forty-sixth prime in the sequence. It is the sum of both 3 and 5 consecutive primes (61 + 67 + 71) and (31 + 37 + 41 + 43 + 47). It is also the final number of the prime quadruplet along with 191, 193 and 197. It is also permutable with 919 and 991 both prime. Even more strange, its emirp pair, 991 can also be found by adding consecutive primes. And one of the terms in that sum is 199 itself! (991 = 191 + 193 + 197 + 199 + 211). Finally, the sum of the digits of 199 is prime. The sum of the squares of the digits are also prime. And the sum of the cubes of the digits are prime.

Unrelated, the battle of Stalingrad lasted 199 days.