138433317397 has 2 divisors, whose sum is σ = 138433317398. Its totient is φ = 138433317396.

The previous prime is 138433317391. The next prime is 138433317409. The reversal of 138433317397 is 793713334831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100895804881 + 37537512516 = 317641^2 + 193746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138433317397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138433317391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69216658698 + 69216658699.

It is an arithmetic number, because the mean of its divisors is an integer number (69216658699).

Almost surely, 2^138433317397 is an apocalyptic number.

It is an amenable number.

138433317397 is a deficient number, since it is larger than the sum of its proper divisors (1).

138433317397 is an equidigital number, since it uses as much as digits as its factorization.

138433317397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 52.

The spelling of 138433317397 in words is "one hundred thirty-eight billion, four hundred thirty-three million, three hundred seventeen thousand, three hundred ninety-seven".