133405133 has 4 divisors (see below), whose sum is σ = 138005340. Its totient is φ = 128804928.

The previous prime is 133405123. The next prime is 133405141. The reversal of 133405133 is 331504331.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28281124 + 105124009 = 5318^2 + 10253^2 .

It is a cyclic number.

It is not a de Polignac number, because 133405133 - 2⁴ = 133405117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133405099 and 133405108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133405123) 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, 2300060 + ... + 2300117.

It is an arithmetic number, because the mean of its divisors is an integer number (34501335).

Almost surely, 2^133405133 is an apocalyptic number.

It is an amenable number.

133405133 is a deficient number, since it is larger than the sum of its proper divisors (4600207).

133405133 is an equidigital number, since it uses as much as digits as its factorization.

133405133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600206.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 133405133 is about 11550.1139821216. The cubic root of 133405133 is about 510.9646397433.

Adding to 133405133 its reverse (331504331), we get a palindrome (464909464).

The spelling of 133405133 in words is "one hundred thirty-three million, four hundred five thousand, one hundred thirty-three".