138848231053949 has 2 divisors, whose sum is σ = 138848231053950. Its totient is φ = 138848231053948.

The previous prime is 138848231053871. The next prime is 138848231053967. The reversal of 138848231053949 is 949350132848831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129274466831449 + 9573764222500 = 11369893^2 + 3094150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138848231053949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138848231053979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69424115526974 + 69424115526975.

It is an arithmetic number, because the mean of its divisors is an integer number (69424115526975).

Almost surely, 2^{138848231053949} is an apocalyptic number.

It is an amenable number.

138848231053949 is a deficient number, since it is larger than the sum of its proper divisors (1).

138848231053949 is an equidigital number, since it uses as much as digits as its factorization.

138848231053949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 179159040, while the sum is 68.

The spelling of 138848231053949 in words is "one hundred thirty-eight trillion, eight hundred forty-eight billion, two hundred thirty-one million, fifty-three thousand, nine hundred forty-nine".