138343773329 has 2 divisors, whose sum is σ = 138343773330. Its totient is φ = 138343773328.

The previous prime is 138343773317. The next prime is 138343773383. The reversal of 138343773329 is 923377343831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134641294225 + 3702479104 = 366935^2 + 60848^2 .

It is a cyclic number.

It is not a de Polignac number, because 138343773329 - 2¹⁶ = 138343707793 is a prime.

It is not a weakly prime, because it can be changed into another prime (138343763329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69171886664 + 69171886665.

It is an arithmetic number, because the mean of its divisors is an integer number (69171886665).

Almost surely, 2^138343773329 is an apocalyptic number.

It is an amenable number.

138343773329 is a deficient number, since it is larger than the sum of its proper divisors (1).

138343773329 is an equidigital number, since it uses as much as digits as its factorization.

138343773329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 53.

The spelling of 138343773329 in words is "one hundred thirty-eight billion, three hundred forty-three million, seven hundred seventy-three thousand, three hundred twenty-nine".