139278719971 has 2 divisors, whose sum is σ = 139278719972. Its totient is φ = 139278719970.

The previous prime is 139278719939. The next prime is 139278720013. The reversal of 139278719971 is 179917872931.

139278719971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (179917872931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139278719971 - 2⁵ = 139278719939 is a prime.

It is not a weakly prime, because it can be changed into another prime (139278719911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69639359985 + 69639359986.

It is an arithmetic number, because the mean of its divisors is an integer number (69639359986).

Almost surely, 2^139278719971 is an apocalyptic number.

139278719971 is a deficient number, since it is larger than the sum of its proper divisors (1).

139278719971 is an equidigital number, since it uses as much as digits as its factorization.

139278719971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12002256, while the sum is 64.

The spelling of 139278719971 in words is "one hundred thirty-nine billion, two hundred seventy-eight million, seven hundred nineteen thousand, nine hundred seventy-one".