11989585 has 4 divisors (see below), whose sum is σ = 14387508. Its totient is φ = 9591664.

The previous prime is 11989553. The next prime is 11989597. The reversal of 11989585 is 58598911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58598911 = 7 ⋅8371273.

It can be written as a sum of positive squares in 2 ways, for example, as 1723969 + 10265616 = 1313^2 + 3204^2 .

It is a cyclic number.

It is not a de Polignac number, because 11989585 - 2⁵ = 11989553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198954 + ... + 1198963.

It is an arithmetic number, because the mean of its divisors is an integer number (3596877).

Almost surely, 2^11989585 is an apocalyptic number.

It is an amenable number.

11989585 is a deficient number, since it is larger than the sum of its proper divisors (2397923).

11989585 is an equidigital number, since it uses as much as digits as its factorization.

11989585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397922.

The product of its digits is 129600, while the sum is 46.

The square root of 11989585 is about 3462.5980130532. The cubic root of 11989585 is about 228.8765949015.

The spelling of 11989585 in words is "eleven million, nine hundred eighty-nine thousand, five hundred eighty-five".