129799 has 4 divisors (see below), whose sum is σ = 130536. Its totient is φ = 129064.

The previous prime is 129793. The next prime is 129803. The reversal of 129799 is 997921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 997921 = 31 ⋅32191.

It is a cyclic number.

It is not a de Polignac number, because 129799 - 2⁷ = 129671 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 (129793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72 + ... + 514.

It is an arithmetic number, because the mean of its divisors is an integer number (32634).

2¹²⁹⁷⁹⁹ is an apocalyptic number.

129799 is a deficient number, since it is larger than the sum of its proper divisors (737).

129799 is an equidigital number, since it uses as much as digits as its factorization.

129799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736.

The product of its digits is 10206, while the sum is 37.

The square root of 129799 is about 360.2762828719. The cubic root of 129799 is about 50.6318483851.

The spelling of 129799 in words is "one hundred twenty-nine thousand, seven hundred ninety-nine".