11665489 has 12 divisors (see below), whose sum is σ = 12908980. Its totient is φ = 10533600.

The previous prime is 11665483. The next prime is 11665501. The reversal of 11665489 is 98456611.

It can be written as a sum of positive squares in 2 ways, for example, as 4695889 + 6969600 = 2167^2 + 2640^2 .

It is not a de Polignac number, because 11665489 - 2³ = 11665481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11665481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27499 + ... + 27919.

Almost surely, 2^11665489 is an apocalyptic number.

It is an amenable number.

11665489 is a deficient number, since it is larger than the sum of its proper divisors (1243491).

11665489 is a wasteful number, since it uses less digits than its factorization.

11665489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 661 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 11665489 is about 3415.4778582213. The cubic root of 11665489 is about 226.7954388917.

The spelling of 11665489 in words is "eleven million, six hundred sixty-five thousand, four hundred eighty-nine".