367
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Number
$367$ (three hundred and sixty-seven) is:
- The $73$rd prime number
- The $3$rd positive integer $n$ after $157, 262$ for which $\map \phi {2 n + 1} < \map \phi {2 n}$:
- $\map \phi {2 \times 367 + 1} = 336$, $\map \phi {2 \times 367} = 366$
- The $26$th long period prime after $7$, $17$, $19$, $23$, $29$, $\ldots$, $181$, $193$, $223$, $229$, $233$, $257$, $263$, $269$, $313$, $337$
- The $28$th left-truncatable prime after $2$, $3$, $5$, $7$, $\ldots$, $197$, $223$, $283$, $313$, $317$, $337$, $347$, $353$
Also see
- Previous ... Next: Prime Number
- Previous ... Next: Prime Gaps of 8
Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $157$