138239055047 has 2 divisors, whose sum is σ = 138239055048. Its totient is φ = 138239055046.

The previous prime is 138239054971. The next prime is 138239055083. The reversal of 138239055047 is 740550932831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138239055047 - 2¹⁸ = 138238792903 is a prime.

It is a super-2 number, since 2×138239055047² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138239054992 and 138239055010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138239055247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69119527523 + 69119527524.

It is an arithmetic number, because the mean of its divisors is an integer number (69119527524).

Almost surely, 2^138239055047 is an apocalyptic number.

138239055047 is a deficient number, since it is larger than the sum of its proper divisors (1).

138239055047 is an equidigital number, since it uses as much as digits as its factorization.

138239055047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 47.

Adding to 138239055047 its reverse (740550932831), we get a palindrome (878789987878).

The spelling of 138239055047 in words is "one hundred thirty-eight billion, two hundred thirty-nine million, fifty-five thousand, forty-seven".