11220689 has 2 divisors, whose sum is σ = 11220690. Its totient is φ = 11220688.

The previous prime is 11220673. The next prime is 11220707. The reversal of 11220689 is 98602211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5721664 + 5499025 = 2392^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220689 - 2⁴ = 11220673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11228689) 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, 5610344 + 5610345.

It is an arithmetic number, because the mean of its divisors is an integer number (5610345).

Almost surely, 2^11220689 is an apocalyptic number.

It is an amenable number.

11220689 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220689 is an equidigital number, since it uses as much as digits as its factorization.

11220689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 11220689 is about 3349.7296905870. The cubic root of 11220689 is about 223.8754688866.

The spelling of 11220689 in words is "eleven million, two hundred twenty thousand, six hundred eighty-nine".