12809133 has 6 divisors (see below), whose sum is σ = 18502094. Its totient is φ = 8539416.

The previous prime is 12809131. The next prime is 12809149. The reversal of 12809133 is 33190821.

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 149769 = 3558^2 + 387^2 .

It is not a de Polignac number, because 12809133 - 2¹ = 12809131 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12809097 and 12809106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12809131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 711610 + ... + 711627.

Almost surely, 2^12809133 is an apocalyptic number.

It is an amenable number.

12809133 is a deficient number, since it is larger than the sum of its proper divisors (5692961).

12809133 is a wasteful number, since it uses less digits than its factorization.

12809133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423243 (or 1423240 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12809133 is about 3578.9849119548. The cubic root of 12809133 is about 233.9770413592.

Adding to 12809133 its reverse (33190821), we get a palindrome (45999954).

The spelling of 12809133 in words is "twelve million, eight hundred nine thousand, one hundred thirty-three".