138318784319 has 2 divisors, whose sum is σ = 138318784320. Its totient is φ = 138318784318.

The previous prime is 138318784271. The next prime is 138318784391. The reversal of 138318784319 is 913487813831.

It is a happy number.

Together with next prime (138318784391) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138318784319 - 2³² = 134023817023 is a prime.

It is a super-2 number, since 2×138318784319² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138318784519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69159392159 + 69159392160.

It is an arithmetic number, because the mean of its divisors is an integer number (69159392160).

Almost surely, 2^138318784319 is an apocalyptic number.

138318784319 is a deficient number, since it is larger than the sum of its proper divisors (1).

138318784319 is an equidigital number, since it uses as much as digits as its factorization.

138318784319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 56.

The spelling of 138318784319 in words is "one hundred thirty-eight billion, three hundred eighteen million, seven hundred eighty-four thousand, three hundred nineteen".