11218489 has 2 divisors, whose sum is σ = 11218490. Its totient is φ = 11218488.

The previous prime is 11218483. The next prime is 11218517. The reversal of 11218489 is 98481211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10942864 + 275625 = 3308^2 + 525^2 .

It is an emirp because it is prime and its reverse (98481211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11218489 - 2¹⁵ = 11185721 is a prime.

It is not a weakly prime, because it can be changed into another prime (11218483) 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 as a sum of consecutive naturals, namely, 5609244 + 5609245.

It is an arithmetic number, because the mean of its divisors is an integer number (5609245).

Almost surely, 2^11218489 is an apocalyptic number.

It is an amenable number.

11218489 is a deficient number, since it is larger than the sum of its proper divisors (1).

11218489 is an equidigital number, since it uses as much as digits as its factorization.

11218489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 34.

The square root of 11218489 is about 3349.4012897830. The cubic root of 11218489 is about 223.8608364451.

The spelling of 11218489 in words is "eleven million, two hundred eighteen thousand, four hundred eighty-nine".