139278720013 has 2 divisors, whose sum is σ = 139278720014. Its totient is φ = 139278720012.

The previous prime is 139278719971. The next prime is 139278720083. The reversal of 139278720013 is 310027872931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136576071844 + 2702648169 = 369562^2 + 51987^2 .

It is a cyclic number.

It is not a de Polignac number, because 139278720013 - 2²¹ = 139276622861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139278720083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69639360006 + 69639360007.

It is an arithmetic number, because the mean of its divisors is an integer number (69639360007).

Almost surely, 2^139278720013 is an apocalyptic number.

It is an amenable number.

139278720013 is a deficient number, since it is larger than the sum of its proper divisors (1).

139278720013 is an equidigital number, since it uses as much as digits as its factorization.

139278720013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 139278720013 in words is "one hundred thirty-nine billion, two hundred seventy-eight million, seven hundred twenty thousand, thirteen".