129344623 has 4 divisors (see below), whose sum is σ = 129369400. Its totient is φ = 129319848.

The previous prime is 129344603. The next prime is 129344629. The reversal of 129344623 is 326443921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326443921 = 19 ⋅17181259.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129344623 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 (129344629) 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, 1173 + ... + 16126.

It is an arithmetic number, because the mean of its divisors is an integer number (32342350).

Almost surely, 2^129344623 is an apocalyptic number.

129344623 is a deficient number, since it is larger than the sum of its proper divisors (24777).

129344623 is an equidigital number, since it uses as much as digits as its factorization.

129344623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24776.

The product of its digits is 31104, while the sum is 34.

The square root of 129344623 is about 11372.9777543087. The cubic root of 129344623 is about 505.7269835384.

The spelling of 129344623 in words is "one hundred twenty-nine million, three hundred forty-four thousand, six hundred twenty-three".