12813133 has 4 divisors (see below), whose sum is σ = 12821760. Its totient is φ = 12804508.

The previous prime is 12813131. The next prime is 12813149. The reversal of 12813133 is 33131821.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12813133 - 2¹ = 12813131 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 (12813131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453 + ... + 5266.

It is an arithmetic number, because the mean of its divisors is an integer number (3205440).

Almost surely, 2^12813133 is an apocalyptic number.

It is an amenable number.

12813133 is a deficient number, since it is larger than the sum of its proper divisors (8627).

12813133 is an equidigital number, since it uses as much as digits as its factorization.

12813133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626.

The product of its digits is 432, while the sum is 22.

The square root of 12813133 is about 3579.5436860024. The cubic root of 12813133 is about 234.0013940551.

Adding to 12813133 its reverse (33131821), we get a palindrome (45944954).

It can be divided in two parts, 128131 and 33, that added together give a square (128164 = 358²).

The spelling of 12813133 in words is "twelve million, eight hundred thirteen thousand, one hundred thirty-three".