138133717789 has 2 divisors, whose sum is σ = 138133717790. Its totient is φ = 138133717788.

The previous prime is 138133717769. The next prime is 138133717847. The reversal of 138133717789 is 987717331831.

It is a happy number.

It is an a-pointer prime, because the next prime (138133717847) can be obtained adding 138133717789 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95508812025 + 42624905764 = 309045^2 + 206458^2 .

It is a cyclic number.

It is not a de Polignac number, because 138133717789 - 2²¹ = 138131620637 is a prime.

It is a super-2 number, since 2×138133717789² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138133717769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69066858894 + 69066858895.

It is an arithmetic number, because the mean of its divisors is an integer number (69066858895).

Almost surely, 2^138133717789 is an apocalyptic number.

It is an amenable number.

138133717789 is a deficient number, since it is larger than the sum of its proper divisors (1).

138133717789 is an equidigital number, since it uses as much as digits as its factorization.

138133717789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 58.

The spelling of 138133717789 in words is "one hundred thirty-eight billion, one hundred thirty-three million, seven hundred seventeen thousand, seven hundred eighty-nine".