IntegerLength[n] gives the number of digits in the base 10 representation of the integer n.IntegerLength[n, b] gives the number of digits in the base b representation of n.
IntegerString[n] gives a string consisting of the decimal digits in the integer n. IntegerString[n, b] gives a string consisting of the base b digits in the integer n. ...
JankoGroupJ2[] represents the sporadic simple Janko group J_2.
LiouvilleLambda[n] gives the Liouville function \[Lambda](n).
Log10
(Built-in Mathematica Symbol) Log10[x] gives the base-10 logarithm of x.
MangoldtLambda[n] gives the von Mangoldt function \[CapitalLambda](n).
NextPrime[n] gives the next prime above n.NextPrime[n, k] gives the k\[Null]^th prime above n.
NumberFieldDiscriminant[a] gives the discriminant of the field \[DoubleStruckCapitalQ][a] generated by the algebraic number a.
ObservabilityMatrix[ss] gives the observability matrix of the StateSpaceModel object ss.
PermutationListQ[expr] returns True if expr is a valid permutation list and False otherwise.