138669762797 has 2 divisors, whose sum is σ = 138669762798. Its totient is φ = 138669762796.

The previous prime is 138669762779. The next prime is 138669762839. The reversal of 138669762797 is 797267966831.

Together with previous prime (138669762779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80081076196 + 58588686601 = 282986^2 + 242051^2 .

It is a cyclic number.

It is not a de Polignac number, because 138669762797 - 2¹⁰ = 138669761773 is a prime.

It is a super-2 number, since 2×138669762797² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138669762797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138669762757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69334881398 + 69334881399.

It is an arithmetic number, because the mean of its divisors is an integer number (69334881399).

Almost surely, 2^138669762797 is an apocalyptic number.

It is an amenable number.

138669762797 is a deficient number, since it is larger than the sum of its proper divisors (1).

138669762797 is an equidigital number, since it uses as much as digits as its factorization.

138669762797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288054144, while the sum is 71.

The spelling of 138669762797 in words is "one hundred thirty-eight billion, six hundred sixty-nine million, seven hundred sixty-two thousand, seven hundred ninety-seven".