133513833 has 4 divisors (see below), whose sum is σ = 178018448. Its totient is φ = 89009220.

The previous prime is 133513823. The next prime is 133513847. The reversal of 133513833 is 338315331.

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: 338315331 = 3 ⋅112771777.

It is not a de Polignac number, because 133513833 - 2¹² = 133509737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133513833.

It is not an unprimeable number, because it can be changed into a prime (133513823) 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, 22252303 + ... + 22252308.

It is an arithmetic number, because the mean of its divisors is an integer number (44504612).

Almost surely, 2^133513833 is an apocalyptic number.

It is an amenable number.

133513833 is a deficient number, since it is larger than the sum of its proper divisors (44504615).

133513833 is an equidigital number, since it uses as much as digits as its factorization.

133513833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44504614.

The product of its digits is 9720, while the sum is 30.

The square root of 133513833 is about 11554.8186052400. The cubic root of 133513833 is about 511.1033819755.

The spelling of 133513833 in words is "one hundred thirty-three million, five hundred thirteen thousand, eight hundred thirty-three".