129539443 has 8 divisors (see below), whose sum is σ = 142637760. Its totient is φ = 116661480.

The previous prime is 129539437. The next prime is 129539461. The reversal of 129539443 is 344935921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129539443 - 2⁹ = 129538931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129539396 and 129539405.

It is not an unprimeable number, because it can be changed into a prime (129531443) 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 in 7 ways as a sum of consecutive naturals, for example, 53853 + ... + 56206.

It is an arithmetic number, because the mean of its divisors is an integer number (17829720).

Almost surely, 2^129539443 is an apocalyptic number.

129539443 is a deficient number, since it is larger than the sum of its proper divisors (13098317).

129539443 is a wasteful number, since it uses less digits than its factorization.

129539443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110177.

The product of its digits is 116640, while the sum is 40.

The square root of 129539443 is about 11381.5395707259. The cubic root of 129539443 is about 505.9807662965.

The spelling of 129539443 in words is "one hundred twenty-nine million, five hundred thirty-nine thousand, four hundred forty-three".