129143423 has 2 divisors, whose sum is σ = 129143424. Its totient is φ = 129143422.

The previous prime is 129143419. The next prime is 129143447. The reversal of 129143423 is 324341921.

It is a weak prime.

It is an emirp because it is prime and its reverse (324341921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129143423 - 2² = 129143419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129143453) 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, 64571711 + 64571712.

It is an arithmetic number, because the mean of its divisors is an integer number (64571712).

Almost surely, 2^129143423 is an apocalyptic number.

129143423 is a deficient number, since it is larger than the sum of its proper divisors (1).

129143423 is an equidigital number, since it uses as much as digits as its factorization.

129143423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 129143423 is about 11364.1287831492. The cubic root of 129143423 is about 505.4646222277.

The spelling of 129143423 in words is "one hundred twenty-nine million, one hundred forty-three thousand, four hundred twenty-three".