129444478243 has 2 divisors, whose sum is σ = 129444478244. Its totient is φ = 129444478242.

The previous prime is 129444478217. The next prime is 129444478249. The reversal of 129444478243 is 342874444921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129444478243 is a prime.

It is not a weakly prime, because it can be changed into another prime (129444478249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64722239121 + 64722239122.

It is an arithmetic number, because the mean of its divisors is an integer number (64722239122).

Almost surely, 2^129444478243 is an apocalyptic number.

129444478243 is a deficient number, since it is larger than the sum of its proper divisors (1).

129444478243 is an equidigital number, since it uses as much as digits as its factorization.

129444478243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6193152, while the sum is 52.

The spelling of 129444478243 in words is "one hundred twenty-nine billion, four hundred forty-four million, four hundred seventy-eight thousand, two hundred forty-three".