129733907 has 4 divisors (see below), whose sum is σ = 134207520. Its totient is φ = 125260296.

The previous prime is 129733889. The next prime is 129733937. The reversal of 129733907 is 709337921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709337921 = 89 ⋅7970089.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129733907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129733937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236763 + ... + 2236820.

It is an arithmetic number, because the mean of its divisors is an integer number (33551880).

Almost surely, 2^129733907 is an apocalyptic number.

129733907 is a deficient number, since it is larger than the sum of its proper divisors (4473613).

129733907 is an equidigital number, since it uses as much as digits as its factorization.

129733907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473612.

The product of its (nonzero) digits is 71442, while the sum is 41.

The square root of 129733907 is about 11390.0793236922. The cubic root of 129733907 is about 506.2338316840.

The spelling of 129733907 in words is "one hundred twenty-nine million, seven hundred thirty-three thousand, nine hundred seven".