138531108743 has 2 divisors, whose sum is σ = 138531108744. Its totient is φ = 138531108742.

The previous prime is 138531108721. The next prime is 138531108761. The reversal of 138531108743 is 347801135831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138531108743 - 2¹⁶ = 138531043207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138531108694 and 138531108703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138531108143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69265554371 + 69265554372.

It is an arithmetic number, because the mean of its divisors is an integer number (69265554372).

Almost surely, 2^138531108743 is an apocalyptic number.

138531108743 is a deficient number, since it is larger than the sum of its proper divisors (1).

138531108743 is an equidigital number, since it uses as much as digits as its factorization.

138531108743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 138531108743 in words is "one hundred thirty-eight billion, five hundred thirty-one million, one hundred eight thousand, seven hundred forty-three".