12690637 has 2 divisors, whose sum is σ = 12690638. Its totient is φ = 12690636.

The previous prime is 12690589. The next prime is 12690649. The reversal of 12690637 is 73609621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10361961 + 2328676 = 3219^2 + 1526^2 .

It is a cyclic number.

It is not a de Polignac number, because 12690637 - 2¹¹ = 12688589 is a prime.

It is a super-2 number, since 2×12690637² = 322104534931538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12690697) 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 as a sum of consecutive naturals, namely, 6345318 + 6345319.

It is an arithmetic number, because the mean of its divisors is an integer number (6345319).

Almost surely, 2^12690637 is an apocalyptic number.

It is an amenable number.

12690637 is a deficient number, since it is larger than the sum of its proper divisors (1).

12690637 is an equidigital number, since it uses as much as digits as its factorization.

12690637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 12690637 is about 3562.3920334517. The cubic root of 12690637 is about 233.2533056622.

The spelling of 12690637 in words is "twelve million, six hundred ninety thousand, six hundred thirty-seven".