129968 has 10 divisors (see below), whose sum is σ = 251844. Its totient is φ = 64976.

The previous prime is 129967. The next prime is 129971. The reversal of 129968 is 869921.

It is not an unprimeable number, because it can be changed into a prime (129967) 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 as a sum of consecutive naturals, namely, 4046 + ... + 4077.

2¹²⁹⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

129968 is a deficient number, since it is larger than the sum of its proper divisors (121876).

129968 is an equidigital number, since it uses as much as digits as its factorization.

129968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8131 (or 8125 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 129968 is about 360.5107487995. The cubic root of 129968 is about 50.6538132985.

The spelling of 129968 in words is "one hundred twenty-nine thousand, nine hundred sixty-eight".