138704928793 has 2 divisors, whose sum is σ = 138704928794. Its totient is φ = 138704928792.

The previous prime is 138704928707. The next prime is 138704928799. The reversal of 138704928793 is 397829407831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100712291904 + 37992636889 = 317352^2 + 194917^2 .

It is a cyclic number.

It is not a de Polignac number, because 138704928793 - 2⁹ = 138704928281 is a prime.

It is not a weakly prime, because it can be changed into another prime (138704928799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69352464396 + 69352464397.

It is an arithmetic number, because the mean of its divisors is an integer number (69352464397).

Almost surely, 2^138704928793 is an apocalyptic number.

It is an amenable number.

138704928793 is a deficient number, since it is larger than the sum of its proper divisors (1).

138704928793 is an equidigital number, since it uses as much as digits as its factorization.

138704928793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 138704928793 in words is "one hundred thirty-eight billion, seven hundred four million, nine hundred twenty-eight thousand, seven hundred ninety-three".