133805383 has 4 divisors (see below), whose sum is σ = 134227800. Its totient is φ = 133382968.

The previous prime is 133805341. The next prime is 133805461. The reversal of 133805383 is 383508331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 383508331 = 19 ⋅20184649.

It is a cyclic number.

It is not a de Polignac number, because 133805383 - 2⁹ = 133804871 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 (133805303) 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, 210733 + ... + 211366.

It is an arithmetic number, because the mean of its divisors is an integer number (33556950).

Almost surely, 2^133805383 is an apocalyptic number.

133805383 is a deficient number, since it is larger than the sum of its proper divisors (422417).

133805383 is an equidigital number, since it uses as much as digits as its factorization.

133805383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422416.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 133805383 is about 11567.4276742930. The cubic root of 133805383 is about 511.4751383561.

The spelling of 133805383 in words is "one hundred thirty-three million, eight hundred five thousand, three hundred eighty-three".