129943 has 4 divisors (see below), whose sum is σ = 141768. Its totient is φ = 118120.

The previous prime is 129937. The next prime is 129953. The reversal of 129943 is 349921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5896 + ... + 5917.

It is an arithmetic number, because the mean of its divisors is an integer number (35442).

2¹²⁹⁹⁴³ is an apocalyptic number.

129943 is a deficient number, since it is larger than the sum of its proper divisors (11825).

129943 is a wasteful number, since it uses less digits than its factorization.

129943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11824.

The product of its digits is 1944, while the sum is 28.

The square root of 129943 is about 360.4760741020. The cubic root of 129943 is about 50.6505652515.

It can be divided in two parts, 12 and 9943, that multiplied together give a triangular number (119316 = T₄₈₈).

The spelling of 129943 in words is "one hundred twenty-nine thousand, nine hundred forty-three".