12936309 has 4 divisors (see below), whose sum is σ = 17248416. Its totient is φ = 8624204.

The previous prime is 12936247. The next prime is 12936311. The reversal of 12936309 is 90363921.

12936309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 90363921 = 3 ⋅30121307.

It is a cyclic number.

It is not a de Polignac number, because 12936309 - 2¹⁶ = 12870773 is a prime.

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 12936309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12936109) 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, 2156049 + ... + 2156054.

It is an arithmetic number, because the mean of its divisors is an integer number (4312104).

Almost surely, 2^12936309 is an apocalyptic number.

It is an amenable number.

12936309 is a deficient number, since it is larger than the sum of its proper divisors (4312107).

12936309 is an equidigital number, since it uses as much as digits as its factorization.

12936309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312106.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 12936309 is about 3596.7080782293. The cubic root of 12936309 is about 234.7488428822.

The spelling of 12936309 in words is "twelve million, nine hundred thirty-six thousand, three hundred nine".