129544799 has 4 divisors (see below), whose sum is σ = 129773040. Its totient is φ = 129316560.

The previous prime is 129544783. The next prime is 129544801. The reversal of 129544799 is 997445921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 997445921 = 131 ⋅7614091.

It is a cyclic number.

It is not a de Polignac number, because 129544799 - 2⁴ = 129544783 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 (129544729) 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, 113267 + ... + 114404.

It is an arithmetic number, because the mean of its divisors is an integer number (32443260).

Almost surely, 2^129544799 is an apocalyptic number.

129544799 is a deficient number, since it is larger than the sum of its proper divisors (228241).

129544799 is an equidigital number, since it uses as much as digits as its factorization.

129544799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228240.

The product of its digits is 816480, while the sum is 50.

The square root of 129544799 is about 11381.7748615934. The cubic root of 129544799 is about 505.9877397082.

The spelling of 129544799 in words is "one hundred twenty-nine million, five hundred forty-four thousand, seven hundred ninety-nine".