12822309 has 6 divisors (see below), whose sum is σ = 18521126. Its totient is φ = 8548200.

The previous prime is 12822289. The next prime is 12822317. The reversal of 12822309 is 90322821.

It is a happy number.

12822309 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 1633284 = 3345^2 + 1278^2 .

It is not a de Polignac number, because 12822309 - 2⁷ = 12822181 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 (12822349) 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, 712342 + ... + 712359.

Almost surely, 2^12822309 is an apocalyptic number.

It is an amenable number.

12822309 is a deficient number, since it is larger than the sum of its proper divisors (5698817).

12822309 is a wasteful number, since it uses less digits than its factorization.

12822309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424707 (or 1424704 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12822309 is about 3580.8251842278. The cubic root of 12822309 is about 234.0572399966.

It can be divided in two parts, 12822 and 309, that added together give a palindrome (13131).

The spelling of 12822309 in words is "twelve million, eight hundred twenty-two thousand, three hundred nine".