Yeah, I indeed Googled it [0]. Wolfram Alpha is also a quick way to verify, just query the number:

https://www.wolframalpha.com/input/?i=1791991

[0] I thought to check because I instantly knew the number was not divisible by 3 (since 1+7+1+1 % 3 = 1), and at that point it's just quicker to look it up than run through the other primes up to sqrt(1791991).