11221789 has 2 divisors, whose sum is σ = 11221790. Its totient is φ = 11221788.

The previous prime is 11221781. The next prime is 11221829. The reversal of 11221789 is 98712211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 1172889 = 3170^2 + 1083^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221789 - 2³ = 11221781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610894 + 5610895.

It is an arithmetic number, because the mean of its divisors is an integer number (5610895).

Almost surely, 2^11221789 is an apocalyptic number.

It is an amenable number.

11221789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221789 is an equidigital number, since it uses as much as digits as its factorization.

11221789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 11221789 is about 3349.8938789162. The cubic root of 11221789 is about 223.8827843901.

The spelling of 11221789 in words is "eleven million, two hundred twenty-one thousand, seven hundred eighty-nine".