12289687 has 2 divisors, whose sum is σ = 12289688. Its totient is φ = 12289686.

The previous prime is 12289681. The next prime is 12289757. The reversal of 12289687 is 78698221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12289687 - 2³ = 12289679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12289681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6144843 + 6144844.

It is an arithmetic number, because the mean of its divisors is an integer number (6144844).

Almost surely, 2^12289687 is an apocalyptic number.

12289687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12289687 is an equidigital number, since it uses as much as digits as its factorization.

12289687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 12289687 is about 3505.6649868463. The cubic root of 12289687 is about 230.7704909874.

The spelling of 12289687 in words is "twelve million, two hundred eighty-nine thousand, six hundred eighty-seven".