129645343 has 4 divisors (see below), whose sum is σ = 129734248. Its totient is φ = 129556440.

The previous prime is 129645323. The next prime is 129645353. The reversal of 129645343 is 343546921.

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

It is a cyclic number.

It is not a de Polignac number, because 129645343 - 2⁹ = 129644831 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 (129645323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42228 + ... + 45193.

It is an arithmetic number, because the mean of its divisors is an integer number (32433562).

Almost surely, 2^129645343 is an apocalyptic number.

129645343 is a deficient number, since it is larger than the sum of its proper divisors (88905).

129645343 is an equidigital number, since it uses as much as digits as its factorization.

129645343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88904.

The product of its digits is 77760, while the sum is 37.

The square root of 129645343 is about 11386.1908907237. The cubic root of 129645343 is about 506.1186104590.

The spelling of 129645343 in words is "one hundred twenty-nine million, six hundred forty-five thousand, three hundred forty-three".