129105539 has 2 divisors, whose sum is σ = 129105540. Its totient is φ = 129105538.

The previous prime is 129105521. The next prime is 129105623. The reversal of 129105539 is 935501921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129105539 - 2¹⁶ = 129040003 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129105499 and 129105508.

It is not a weakly prime, because it can be changed into another prime (129105139) 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, 64552769 + 64552770.

It is an arithmetic number, because the mean of its divisors is an integer number (64552770).

Almost surely, 2^129105539 is an apocalyptic number.

129105539 is a deficient number, since it is larger than the sum of its proper divisors (1).

129105539 is an equidigital number, since it uses as much as digits as its factorization.

129105539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 129105539 is about 11362.4618371196. The cubic root of 129105539 is about 505.4151916694.

The spelling of 129105539 in words is "one hundred twenty-nine million, one hundred five thousand, five hundred thirty-nine".