133435129 has 4 divisors (see below), whose sum is σ = 137739520. Its totient is φ = 129130740.

The previous prime is 133435117. The next prime is 133435153. The reversal of 133435129 is 921534331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 921534331 = 379 ⋅2431489.

It is a cyclic number.

It is not a de Polignac number, because 133435129 - 2¹¹ = 133433081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 4304359 = 133435129 / (1 + 3 + 3 + 4 + 3 + 5 + 1 + 2 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133435129.

It is not an unprimeable number, because it can be changed into a prime (133435109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152149 + ... + 2152210.

It is an arithmetic number, because the mean of its divisors is an integer number (34434880).

Almost surely, 2^133435129 is an apocalyptic number.

It is an amenable number.

133435129 is a deficient number, since it is larger than the sum of its proper divisors (4304391).

133435129 is an equidigital number, since it uses as much as digits as its factorization.

133435129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4304390.

The product of its digits is 9720, while the sum is 31.

The square root of 133435129 is about 11551.4124244613. The cubic root of 133435129 is about 511.0029334891.

It can be divided in two parts, 1334 and 35129, that added together give a palindrome (36463).

The spelling of 133435129 in words is "one hundred thirty-three million, four hundred thirty-five thousand, one hundred twenty-nine".