138695376769 has 2 divisors, whose sum is σ = 138695376770. Its totient is φ = 138695376768.

The previous prime is 138695376767. The next prime is 138695376773. The reversal of 138695376769 is 967673596831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73408483600 + 65286893169 = 270940^2 + 255513^2 .

It is a cyclic number.

It is not a de Polignac number, because 138695376769 - 2¹ = 138695376767 is a prime.

It is a super-2 number, since 2×138695376769² (a number of 23 digits) contains 22 as substring.

Together with 138695376767, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 138695376698 and 138695376707.

It is not a weakly prime, because it can be changed into another prime (138695376767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69347688384 + 69347688385.

It is an arithmetic number, because the mean of its divisors is an integer number (69347688385).

Almost surely, 2^138695376769 is an apocalyptic number.

It is an amenable number.

138695376769 is a deficient number, since it is larger than the sum of its proper divisors (1).

138695376769 is an equidigital number, since it uses as much as digits as its factorization.

138695376769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308629440, while the sum is 70.

The spelling of 138695376769 in words is "one hundred thirty-eight billion, six hundred ninety-five million, three hundred seventy-six thousand, seven hundred sixty-nine".