11987687 has 2 divisors, whose sum is σ = 11987688. Its totient is φ = 11987686.

The previous prime is 11987681. The next prime is 11987719. The reversal of 11987687 is 78678911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11987687 - 2⁴ = 11987671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11987681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5993843 + 5993844.

It is an arithmetic number, because the mean of its divisors is an integer number (5993844).

Almost surely, 2^11987687 is an apocalyptic number.

11987687 is a deficient number, since it is larger than the sum of its proper divisors (1).

11987687 is an equidigital number, since it uses as much as digits as its factorization.

11987687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 47.

The square root of 11987687 is about 3462.3239305415. The cubic root of 11987687 is about 228.8645168993.

The spelling of 11987687 in words is "eleven million, nine hundred eighty-seven thousand, six hundred eighty-seven".