12694009 has 4 divisors (see below), whose sum is σ = 12786804. Its totient is φ = 12601216.

The previous prime is 12693991. The next prime is 12694013. The reversal of 12694009 is 90049621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90049621 = 139 ⋅647839.

It can be written as a sum of positive squares in 2 ways, for example, as 8832784 + 3861225 = 2972^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 12694009 - 2⁹ = 12693497 is a prime.

It is a super-2 number, since 2×12694009² = 322275728984162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12694049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46192 + ... + 46465.

It is an arithmetic number, because the mean of its divisors is an integer number (3196701).

Almost surely, 2^12694009 is an apocalyptic number.

It is an amenable number.

12694009 is a deficient number, since it is larger than the sum of its proper divisors (92795).

12694009 is an equidigital number, since it uses as much as digits as its factorization.

12694009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92794.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 12694009 is about 3562.8652795187. The cubic root of 12694009 is about 233.2739628993.

The spelling of 12694009 in words is "twelve million, six hundred ninety-four thousand, nine".