129999731564743 has 2 divisors, whose sum is σ = 129999731564744. Its totient is φ = 129999731564742.

The previous prime is 129999731564741. The next prime is 129999731564761. The reversal of 129999731564743 is 347465137999921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129999731564743 - 2¹ = 129999731564741 is a prime.

Together with 129999731564741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129999731564741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64999865782371 + 64999865782372.

It is an arithmetic number, because the mean of its divisors is an integer number (64999865782372).

Almost surely, 2^{129999731564743} is an apocalyptic number.

129999731564743 is a deficient number, since it is larger than the sum of its proper divisors (1).

129999731564743 is an equidigital number, since it uses as much as digits as its factorization.

129999731564743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2777664960, while the sum is 79.

The spelling of 129999731564743 in words is "one hundred twenty-nine trillion, nine hundred ninety-nine billion, seven hundred thirty-one million, five hundred sixty-four thousand, seven hundred forty-three".