11385989 has 4 divisors (see below), whose sum is σ = 11881056. Its totient is φ = 10890924.

The previous prime is 11385961. The next prime is 11385991. The reversal of 11385989 is 98958311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98958311 = 181 ⋅546731.

It is a cyclic number.

It is not a de Polignac number, because 11385989 - 2²⁰ = 10337413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11385949) by changing a digit.

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, 247499 + ... + 247544.

It is an arithmetic number, because the mean of its divisors is an integer number (2970264).

Almost surely, 2^11385989 is an apocalyptic number.

It is an amenable number.

11385989 is a deficient number, since it is larger than the sum of its proper divisors (495067).

11385989 is an equidigital number, since it uses as much as digits as its factorization.

11385989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495066.

The product of its digits is 77760, while the sum is 44.

The square root of 11385989 is about 3374.3131152873. The cubic root of 11385989 is about 224.9694707549.

The spelling of 11385989 in words is "eleven million, three hundred eighty-five thousand, nine hundred eighty-nine".