12813433 has 4 divisors (see below), whose sum is σ = 13159780. Its totient is φ = 12467088.

The previous prime is 12813413. The next prime is 12813487. The reversal of 12813433 is 33431821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33431821 = 2341 ⋅14281.

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 3523129 = 3048^2 + 1877^2 .

It is a cyclic number.

It is not a de Polignac number, because 12813433 - 2²¹ = 10716281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12813398 and 12813407.

It is not an unprimeable number, because it can be changed into a prime (12813403) 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, 173118 + ... + 173191.

It is an arithmetic number, because the mean of its divisors is an integer number (3289945).

Almost surely, 2^12813433 is an apocalyptic number.

It is an amenable number.

12813433 is a deficient number, since it is larger than the sum of its proper divisors (346347).

12813433 is an equidigital number, since it uses as much as digits as its factorization.

12813433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346346.

The product of its digits is 1728, while the sum is 25.

The square root of 12813433 is about 3579.5855905398. The cubic root of 12813433 is about 234.0032203029.

The spelling of 12813433 in words is "twelve million, eight hundred thirteen thousand, four hundred thirty-three".