This number is a prime.
The smallest prime factor of the smallest multidigit composite Lucas number with a prime index.
The number of chromatically unique simple graphs on seven nodes. [Post]
Pomerance showed that the second largest prime factor of an odd perfect number should be at least 139.
139 = 9*8+7*6+5*4+3*2-1. [Silva]
139 = prime(1*3*9) + 1*3*9 + π(1*3*9) is the only known prime with this property. [Firoozbakht]
The smallest prime number whose product of digits is a prime cube. [Gudipati]
"The children of the porters: the children of Shallum, the children of Ater, the children of Talmon, the children of Akkub, the children of Hatita, the children of Shobai, in all an hundred thirty and nine." (Ezra 2:42, KJV) [Repasi]
The smallest prime separated from the next prime by a composite number of successive composites. [Beedassy]
The number of odd prime days in prime months plus even composite days in composite months in a leap year. [Homewood]
The word 'begat' is found in 139 verses of the KJV Bible. James Ussher, Archbishop of Armagh, Primate of All Ireland, utilized them in his chronology of the world.
139 is the only number n less than 1000 such that 2^999-n is prime. [Loungrides]
You cannot build a square pyramidal stack of cannonballs without the top ball with a prime number of cannonballs greater than 139. [Honaker]
2^1 + 2^3 + 2^9 +/- 1 and 2^1 + 2^3 + 2^9 + 139^2 are all prime. [Homewood]
(1+3+9)^(1+3+9) + sigma(139)^sigma(139) is prime and the largest known of this form. [Sariyar]
"Miss 139" is a lost American silent crime drama film produced by A. H. Fischer. [Farmer]
139, 1399, 13999, 139999, and 1399999 are all prime! [Anitha]
There were 139 episodes of the American fantasy sitcom television series I Dream of Jeannie. [Ridings]
139 is the first prime number in which the next prime ends with the same digit. [Arte]
Uranium-235 occurs in a ratio of 1 to 139 in natural uranium ore. [Rhodes]