133205383 has 4 divisors (see below), whose sum is σ = 133537968. Its totient is φ = 132872800.

The previous prime is 133205341. The next prime is 133205389. The reversal of 133205383 is 383502331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 133205383 - 2²¹ = 131108231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133205389) 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, 165691 + ... + 166492.

It is an arithmetic number, because the mean of its divisors is an integer number (33384492).

Almost surely, 2^133205383 is an apocalyptic number.

133205383 is a deficient number, since it is larger than the sum of its proper divisors (332585).

133205383 is an equidigital number, since it uses as much as digits as its factorization.

133205383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332584.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 133205383 is about 11541.4636420170. The cubic root of 133205383 is about 510.7094867162.

It can be divided in two parts, 13320538 and 3, that added together give a triangular number (13320541 = T₅₁₆₁).

The spelling of 133205383 in words is "one hundred thirty-three million, two hundred five thousand, three hundred eighty-three".