129133833 has 4 divisors (see below), whose sum is σ = 172178448. Its totient is φ = 86089220.

The previous prime is 129133813. The next prime is 129133903. The reversal of 129133833 is 338331921.

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 129133833 - 2⁸ = 129133577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129133794 and 129133803.

It is not an unprimeable number, because it can be changed into a prime (129133813) 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, 21522303 + ... + 21522308.

It is an arithmetic number, because the mean of its divisors is an integer number (43044612).

Almost surely, 2^129133833 is an apocalyptic number.

It is an amenable number.

129133833 is a deficient number, since it is larger than the sum of its proper divisors (43044615).

129133833 is an equidigital number, since it uses as much as digits as its factorization.

129133833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43044614.

The product of its digits is 11664, while the sum is 33.

The square root of 129133833 is about 11363.7068335997. The cubic root of 129133833 is about 505.4521102324.

The spelling of 129133833 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, eight hundred thirty-three".