129712133 has 4 divisors (see below), whose sum is σ = 129741408. Its totient is φ = 129682860.

The previous prime is 129712127. The next prime is 129712181. The reversal of 129712133 is 331217921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129712133 - 2⁴ = 129712117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129712096 and 129712105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129712103) 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, 6473 + ... + 17358.

It is an arithmetic number, because the mean of its divisors is an integer number (32435352).

Almost surely, 2^129712133 is an apocalyptic number.

It is an amenable number.

129712133 is a deficient number, since it is larger than the sum of its proper divisors (29275).

129712133 is an equidigital number, since it uses as much as digits as its factorization.

129712133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29274.

The product of its digits is 2268, while the sum is 29.

The square root of 129712133 is about 11389.1234517850. The cubic root of 129712133 is about 506.2055087050.

The spelling of 129712133 in words is "one hundred twenty-nine million, seven hundred twelve thousand, one hundred thirty-three".