12684679 has 6 divisors (see below), whose sum is σ = 14755704. Its totient is φ = 10872540.

The previous prime is 12684677. The next prime is 12684701. The reversal of 12684679 is 97648621.

It is not a de Polignac number, because 12684679 - 2¹ = 12684677 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 (12684671) 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 5 ways as a sum of consecutive naturals, for example, 129387 + ... + 129484.

It is an arithmetic number, because the mean of its divisors is an integer number (2459284).

Almost surely, 2^12684679 is an apocalyptic number.

12684679 is a deficient number, since it is larger than the sum of its proper divisors (2071025).

12684679 is an equidigital number, since it uses as much as digits as its factorization.

12684679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258885 (or 258878 counting only the distinct ones).

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

The square root of 12684679 is about 3561.5556994100. Note that the first 3 decimals coincide. The cubic root of 12684679 is about 233.2167973625.

The spelling of 12684679 in words is "twelve million, six hundred eighty-four thousand, six hundred seventy-nine".