A “scariest number” is something that might mean different things to different people. There is nothing intrinsically terrifying about numbers. It’s possible, though, that some people’s superstitions or cultural beliefs about particular numbers make those numbers feel ominous or threatening to them.
Which is the scariest number?
In Western culture, for instance, the number 13 has long been linked to superstition and perceptions of bad luck. Triskaidekaphobia refers to an irrational aversion to the number 13. Nonetheless, the term for “death” sounds close to “4” in various Asian languages, making this number unlucky in those societies.
These apprehensions are not founded on rational considerations about numbers, but rather on cultural superstitions and beliefs. As a result, there is nothing intrinsic about numbers that makes them scary or not; rather, it is a matter of one’s beliefs and upbringing.