11887543 has 2 divisors, whose sum is σ = 11887544. Its totient is φ = 11887542.

The previous prime is 11887541. The next prime is 11887549. The reversal of 11887543 is 34578811.

It is a weak prime.

It is an emirp because it is prime and its reverse (34578811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11887543 - 2¹ = 11887541 is a prime.

Together with 11887541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11887541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5943771 + 5943772.

It is an arithmetic number, because the mean of its divisors is an integer number (5943772).

Almost surely, 2^11887543 is an apocalyptic number.

11887543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11887543 is an equidigital number, since it uses as much as digits as its factorization.

11887543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 11887543 is about 3447.8316374208. The cubic root of 11887543 is about 228.2254298029.

The spelling of 11887543 in words is "eleven million, eight hundred eighty-seven thousand, five hundred forty-three".