129452343 has 4 divisors (see below), whose sum is σ = 172603128. Its totient is φ = 86301560.

The previous prime is 129452291. The next prime is 129452353. The reversal of 129452343 is 343254921.

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 129452343 - 2⁹ = 129451831 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129452353) 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 3 ways as a sum of consecutive naturals, for example, 21575388 + ... + 21575393.

It is an arithmetic number, because the mean of its divisors is an integer number (43150782).

Almost surely, 2^129452343 is an apocalyptic number.

129452343 is a deficient number, since it is larger than the sum of its proper divisors (43150785).

129452343 is an equidigital number, since it uses as much as digits as its factorization.

129452343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43150784.

The product of its digits is 25920, while the sum is 33.

The square root of 129452343 is about 11377.7125556941. The cubic root of 129452343 is about 505.8673367368.

It can be divided in two parts, 129452 and 343, that added together give a triangular number (129795 = T₅₀₉).

The spelling of 129452343 in words is "one hundred twenty-nine million, four hundred fifty-two thousand, three hundred forty-three".