149

Number
$149$ (one hundred and forty-nine) is:


 * The $35$th prime number


 * The larger of the $1$st pair of primes whose prime gap is $10$:
 * $149 - 139 = 10$


 * The $3$rd obstinate number after $1$, $127$


 * The $5$th term of the $3$rd $5$-tuple of consecutive integers have the property that they are not values of the $\sigma$ function $\sigma \left({n}\right)$ for any $n$:
 * $\left({145, 146, 147, 148, 149}\right)$


 * The $6$th prime number after $53$, $71$, $103$, $107$, $109$ which cannot be expressed as the difference between a power of $2$ and a power of $3$.


 * The $11$th emirp after $13$, $17$, $31$, $37$, $71$, $73$, $79$, $97$, $107$, $113$


 * The $1$st of the $12$th pair of twin primes, with $151$


 * The $13$th prime number after $7$, $17$, $19$, $23$, $29$, $47$, $59$, $61$, $97$, $109$, $113$, $131$ the period of whose reciprocal, when expressed in decimal notation, is of maximum length:
 * $\dfrac 1 {149} = $


 * The $15$th positive integer $n$ after $0$, $1$, $5$, $25$, $29$, $41$, $49$, $61$, $65$, $85$, $89$, $101$, $125$, $145$ such that the Fibonacci number $F_n$ ends in $n$

Also see