11638687 has 2 divisors, whose sum is σ = 11638688. Its totient is φ = 11638686.

The previous prime is 11638673. The next prime is 11638699. The reversal of 11638687 is 78683611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11638687 - 2⁷ = 11638559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11638087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819343 + 5819344.

It is an arithmetic number, because the mean of its divisors is an integer number (5819344).

Almost surely, 2^11638687 is an apocalyptic number.

11638687 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638687 is an equidigital number, since it uses as much as digits as its factorization.

11638687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 11638687 is about 3411.5519928619. The cubic root of 11638687 is about 226.6216147005.

The spelling of 11638687 in words is "eleven million, six hundred thirty-eight thousand, six hundred eighty-seven".