129181043 has 2 divisors, whose sum is σ = 129181044. Its totient is φ = 129181042.

The previous prime is 129181033. The next prime is 129181067. The reversal of 129181043 is 340181921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129181043 - 2²⁰ = 128132467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129180997 and 129181015.

It is not a weakly prime, because it can be changed into another prime (129181033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64590521 + 64590522.

It is an arithmetic number, because the mean of its divisors is an integer number (64590522).

Almost surely, 2^129181043 is an apocalyptic number.

129181043 is a deficient number, since it is larger than the sum of its proper divisors (1).

129181043 is an equidigital number, since it uses as much as digits as its factorization.

129181043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 129181043 is about 11365.7838708995. The cubic root of 129181043 is about 505.5136987570.

The spelling of 129181043 in words is "one hundred twenty-nine million, one hundred eighty-one thousand, forty-three".