11005289 has 8 divisors (see below), whose sum is σ = 11161800. Its totient is φ = 10850176.

The previous prime is 11005283. The next prime is 11005301. The reversal of 11005289 is 98250011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 714025 + 10291264 = 845^2 + 3208^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11005289 is a prime.

It is a super-2 number, since 2×11005289² = 242232771947042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11005283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34559 + ... + 34875.

It is an arithmetic number, because the mean of its divisors is an integer number (1395225).

Almost surely, 2^11005289 is an apocalyptic number.

It is an amenable number.

11005289 is a deficient number, since it is larger than the sum of its proper divisors (156511).

11005289 is a wasteful number, since it uses less digits than its factorization.

11005289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 11005289 is about 3317.4220412845. The cubic root of 11005289 is about 222.4336476811.

The spelling of 11005289 in words is "eleven million, five thousand, two hundred eighty-nine".