129699 has 6 divisors (see below), whose sum is σ = 187356. Its totient is φ = 86460.

The previous prime is 129671. The next prime is 129707. The reversal of 129699 is 996921.

It is not a de Polignac number, because 129699 - 2⁸ = 129443 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (129629) 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 5 ways as a sum of consecutive naturals, for example, 7197 + ... + 7214.

It is an arithmetic number, because the mean of its divisors is an integer number (31226).

2¹²⁹⁶⁹⁹ is an apocalyptic number.

129699 is a deficient number, since it is larger than the sum of its proper divisors (57657).

129699 is a wasteful number, since it uses less digits than its factorization.

129699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14417 (or 14414 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 129699 is about 360.1374737513. The cubic root of 129699 is about 50.6188424152.

It can be divided in two parts, 129 and 699, that added together give a palindrome (828).

The spelling of 129699 in words is "one hundred twenty-nine thousand, six hundred ninety-nine".