129929543 has 8 divisors (see below), whose sum is σ = 136879920. Its totient is φ = 122990400.

The previous prime is 129929539. The next prime is 129929557. The reversal of 129929543 is 345929921.

It is a happy number.

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 129929543 - 2² = 129929539 is a prime.

It is a super-2 number, since 2×129929543² = 33763372288377698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129929494 and 129929503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129929563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32321 + ... + 36117.

It is an arithmetic number, because the mean of its divisors is an integer number (17109990).

Almost surely, 2^129929543 is an apocalyptic number.

129929543 is a deficient number, since it is larger than the sum of its proper divisors (6950377).

129929543 is a wasteful number, since it uses less digits than its factorization.

129929543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5617.

The product of its digits is 174960, while the sum is 44.

The square root of 129929543 is about 11398.6640883921. The cubic root of 129929543 is about 506.4881672022.

The spelling of 129929543 in words is "one hundred twenty-nine million, nine hundred twenty-nine thousand, five hundred forty-three".