1380917729869 has 2 divisors, whose sum is σ = 1380917729870. Its totient is φ = 1380917729868.

The previous prime is 1380917729857. The next prime is 1380917729903. The reversal of 1380917729869 is 9689277190831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1352208494025 + 28709235844 = 1162845^2 + 169438^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380917729869 - 2¹⁹ = 1380917205581 is a prime.

It is a super-2 number, since 2×1380917729869² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1380917729798 and 1380917729807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380917729069) 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, 690458864934 + 690458864935.

It is an arithmetic number, because the mean of its divisors is an integer number (690458864935).

Almost surely, 2^{1380917729869} is an apocalyptic number.

It is an amenable number.

1380917729869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380917729869 is an equidigital number, since it uses as much as digits as its factorization.

1380917729869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82301184, while the sum is 70.

The spelling of 1380917729869 in words is "one trillion, three hundred eighty billion, nine hundred seventeen million, seven hundred twenty-nine thousand, eight hundred sixty-nine".