12784669 has 4 divisors (see below), whose sum is σ = 12908896. Its totient is φ = 12660444.

The previous prime is 12784643. The next prime is 12784687. The reversal of 12784669 is 96648721.

12784669 is digitally balanced in base 3, 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: 96648721 = 13 ⋅7434517.

It is a cyclic number.

It is not a de Polignac number, because 12784669 - 2⁵ = 12784637 is a prime.

It is a super-2 number, since 2×12784669² = 326895522879122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12784609) 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, 61959 + ... + 62164.

It is an arithmetic number, because the mean of its divisors is an integer number (3227224).

Almost surely, 2^12784669 is an apocalyptic number.

It is an amenable number.

12784669 is a deficient number, since it is larger than the sum of its proper divisors (124227).

12784669 is a wasteful number, since it uses less digits than its factorization.

12784669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124226.

The product of its digits is 145152, while the sum is 43.

The square root of 12784669 is about 3575.5655496718. The cubic root of 12784669 is about 233.8279898377.

The spelling of 12784669 in words is "twelve million, seven hundred eighty-four thousand, six hundred sixty-nine".