129743246869 has 2 divisors, whose sum is σ = 129743246870. Its totient is φ = 129743246868.

The previous prime is 129743246851. The next prime is 129743246881. The reversal of 129743246869 is 968642347921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78897506769 + 50845740100 = 280887^2 + 225490^2 .

It is an emirp because it is prime and its reverse (968642347921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129743246869 - 2¹⁷ = 129743115797 is a prime.

It is a super-2 number, since 2×129743246869² (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 (129743246569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64871623434 + 64871623435.

It is an arithmetic number, because the mean of its divisors is an integer number (64871623435).

Almost surely, 2^129743246869 is an apocalyptic number.

It is an amenable number.

129743246869 is a deficient number, since it is larger than the sum of its proper divisors (1).

129743246869 is an equidigital number, since it uses as much as digits as its factorization.

129743246869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 61.

The spelling of 129743246869 in words is "one hundred twenty-nine billion, seven hundred forty-three million, two hundred forty-six thousand, eight hundred sixty-nine".