12694309 has 4 divisors (see below), whose sum is σ = 12728716. Its totient is φ = 12659904.

The previous prime is 12694271. The next prime is 12694327. The reversal of 12694309 is 90349621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7963684 + 4730625 = 2822^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 12694309 - 2⁹ = 12693797 is a prime.

It is a super-2 number, since 2×12694309² = 322290961974962, 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 (12694349) 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, 16644 + ... + 17389.

It is an arithmetic number, because the mean of its divisors is an integer number (3182179).

Almost surely, 2^12694309 is an apocalyptic number.

It is an amenable number.

12694309 is a deficient number, since it is larger than the sum of its proper divisors (34407).

12694309 is an equidigital number, since it uses as much as digits as its factorization.

12694309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34406.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 12694309 is about 3562.9073802163. The cubic root of 12694309 is about 233.2758005546.

The spelling of 12694309 in words is "twelve million, six hundred ninety-four thousand, three hundred nine".