31
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Let's call a prime number a $\textit{reversible prime}$ if the number formed by reversing its digits is also prime. What is the smallest reversible prime greater than 17?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
31
Let's call a prime number a $\textit{reversible prime}$ if the number formed by reversing its digits is also prime. What is the smallest reversible prime greater than 17?
train