129843109 has 12 divisors (see below), whose sum is σ = 143121888. Its totient is φ = 116822600.

The previous prime is 129843107. The next prime is 129843113. The reversal of 129843109 is 901348921.

It is not a de Polignac number, because 129843109 - 2¹ = 129843107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129843107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125424 + ... + 126454.

It is an arithmetic number, because the mean of its divisors is an integer number (11926824).

Almost surely, 2^129843109 is an apocalyptic number.

It is an amenable number.

129843109 is a deficient number, since it is larger than the sum of its proper divisors (13278779).

129843109 is a wasteful number, since it uses less digits than its factorization.

129843109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 129843109 is about 11394.8720484260. The cubic root of 129843109 is about 506.3758306533.

The spelling of 129843109 in words is "one hundred twenty-nine million, eight hundred forty-three thousand, one hundred nine".