129907 has 4 divisors (see below), whose sum is σ = 133456. Its totient is φ = 126360.

The previous prime is 129901. The next prime is 129917. The reversal of 129907 is 709921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129907 - 2¹¹ = 127859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129901) 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 3 ways as a sum of consecutive naturals, for example, 1719 + ... + 1792.

It is an arithmetic number, because the mean of its divisors is an integer number (33364).

2¹²⁹⁹⁰⁷ is an apocalyptic number.

129907 is a deficient number, since it is larger than the sum of its proper divisors (3549).

129907 is an equidigital number, since it uses as much as digits as its factorization.

129907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 129907 is about 360.4261366771. The cubic root of 129907 is about 50.6458873317.

The spelling of 129907 in words is "one hundred twenty-nine thousand, nine hundred seven".