138349765769 has 2 divisors, whose sum is σ = 138349765770. Its totient is φ = 138349765768.

The previous prime is 138349765699. The next prime is 138349765819. The reversal of 138349765769 is 967567943831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132201324025 + 6148441744 = 363595^2 + 78412^2 .

It is a cyclic number.

It is not a de Polignac number, because 138349765769 - 2⁸ = 138349765513 is a prime.

It is a super-2 number, since 2×138349765769² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138349765699 and 138349765708.

It is not a weakly prime, because it can be changed into another prime (138349765469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69174882884 + 69174882885.

It is an arithmetic number, because the mean of its divisors is an integer number (69174882885).

Almost surely, 2^138349765769 is an apocalyptic number.

It is an amenable number.

138349765769 is a deficient number, since it is larger than the sum of its proper divisors (1).

138349765769 is an equidigital number, since it uses as much as digits as its factorization.

138349765769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 205752960, while the sum is 68.

The spelling of 138349765769 in words is "one hundred thirty-eight billion, three hundred forty-nine million, seven hundred sixty-five thousand, seven hundred sixty-nine".