139968
(another Prime Pages' Curiosity)
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Participate:
+ 139968 = phi( (1*3*9*9*6*8)*(1+3+9+9+6+8) ). Note that 139968 is the only six-digit number with this property. [Firoozbakht]

+ 139968 = (1*3*9*9*6*8) * phi(1+3+9+9+6+8). Note that 139968 is the only six-digit number with this property. [Firoozbakht]

+ 139968 = (1+3+9+9+6+8) * phi(1*3*9*9*6*8). Note that 139968 is the only six-digit number with this property. [Firoozbakht]




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