129899 has 12 divisors (see below), whose sum is σ = 165528. Its totient is φ = 100800.

The previous prime is 129893. The next prime is 129901. The reversal of 129899 is 998921.

It is not a de Polignac number, because 129899 - 2⁸ = 129643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 419 + ... + 659.

It is an arithmetic number, because the mean of its divisors is an integer number (13794).

2¹²⁹⁸⁹⁹ is an apocalyptic number.

129899 is a deficient number, since it is larger than the sum of its proper divisors (35629).

129899 is a wasteful number, since it uses less digits than its factorization.

129899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 259 counting only the distinct ones).

The product of its digits is 11664, while the sum is 38.

The square root of 129899 is about 360.4150385320. The cubic root of 129899 is about 50.6448476767.

The spelling of 129899 in words is "one hundred twenty-nine thousand, eight hundred ninety-nine".