220789 has 2 divisors, whose sum is σ = 220790. Its totient is φ = 220788.

The previous prime is 220783. The next prime is 220793. The reversal of 220789 is 987022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 11025 = 458^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 220789 - 2⁵ = 220757 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 (220783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110394 + 110395.

It is an arithmetic number, because the mean of its divisors is an integer number (110395).

2²²⁰⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

220789 is a deficient number, since it is larger than the sum of its proper divisors (1).

220789 is an equidigital number, since it uses as much as digits as its factorization.

220789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 220789 is about 469.8819000557. The cubic root of 220789 is about 60.4401885951.

The spelling of 220789 in words is "two hundred twenty thousand, seven hundred eighty-nine".