12694687 has 2 divisors, whose sum is σ = 12694688. Its totient is φ = 12694686.

The previous prime is 12694667. The next prime is 12694697. The reversal of 12694687 is 78649621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12694687 is a prime.

It is a super-2 number, since 2×12694687² = 322310156055938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12694637) 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 as a sum of consecutive naturals, namely, 6347343 + 6347344.

It is an arithmetic number, because the mean of its divisors is an integer number (6347344).

Almost surely, 2^12694687 is an apocalyptic number.

12694687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12694687 is an equidigital number, since it uses as much as digits as its factorization.

12694687 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12694687 is about 3562.9604263870. The cubic root of 12694687 is about 233.2781159590.

The spelling of 12694687 in words is "twelve million, six hundred ninety-four thousand, six hundred eighty-seven".