220544789 has 2 divisors, whose sum is σ = 220544790. Its totient is φ = 220544788.

The previous prime is 220544783. The next prime is 220544833. The reversal of 220544789 is 987445022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167909764 + 52635025 = 12958^2 + 7255^2 .

It is a cyclic number.

It is not a de Polignac number, because 220544789 - 2¹² = 220540693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220544783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110272394 + 110272395.

It is an arithmetic number, because the mean of its divisors is an integer number (110272395).

Almost surely, 2^220544789 is an apocalyptic number.

It is an amenable number.

220544789 is a deficient number, since it is larger than the sum of its proper divisors (1).

220544789 is an equidigital number, since it uses as much as digits as its factorization.

220544789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 220544789 is about 14850.7504524182. The cubic root of 220544789 is about 604.1789641529.

The spelling of 220544789 in words is "two hundred twenty million, five hundred forty-four thousand, seven hundred eighty-nine".