220384789 has 2 divisors, whose sum is σ = 220384790. Its totient is φ = 220384788.

The previous prime is 220384783. The next prime is 220384807. The reversal of 220384789 is 987483022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213452100 + 6932689 = 14610^2 + 2633^2 .

It is a cyclic number.

It is not a de Polignac number, because 220384789 - 2¹⁵ = 220352021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220384783) 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, 110192394 + 110192395.

It is an arithmetic number, because the mean of its divisors is an integer number (110192395).

Almost surely, 2^220384789 is an apocalyptic number.

It is an amenable number.

220384789 is a deficient number, since it is larger than the sum of its proper divisors (1).

220384789 is an equidigital number, since it uses as much as digits as its factorization.

220384789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 220384789 is about 14845.3625418849. The cubic root of 220384789 is about 604.0328229827.

The spelling of 220384789 in words is "two hundred twenty million, three hundred eighty-four thousand, seven hundred eighty-nine".