11986559 has 4 divisors (see below), whose sum is σ = 12908616. Its totient is φ = 11064504.

The previous prime is 11986529. The next prime is 11986571. The reversal of 11986559 is 95568911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11986559 - 2¹⁶ = 11921023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11986529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461009 + ... + 461034.

It is an arithmetic number, because the mean of its divisors is an integer number (3227154).

Almost surely, 2^11986559 is an apocalyptic number.

11986559 is a deficient number, since it is larger than the sum of its proper divisors (922057).

11986559 is an equidigital number, since it uses as much as digits as its factorization.

11986559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922056.

The product of its digits is 97200, while the sum is 44.

The square root of 11986559 is about 3462.1610303393. The cubic root of 11986559 is about 228.8573382202.

The spelling of 11986559 in words is "eleven million, nine hundred eighty-six thousand, five hundred fifty-nine".