220394189 has 2 divisors, whose sum is σ = 220394190. Its totient is φ = 220394188.

The previous prime is 220394177. The next prime is 220394197. The reversal of 220394189 is 981493022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220374025 + 20164 = 14845^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 220394189 - 2⁴ = 220394173 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 (220390189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110197094 + 110197095.

It is an arithmetic number, because the mean of its divisors is an integer number (110197095).

Almost surely, 2^220394189 is an apocalyptic number.

It is an amenable number.

220394189 is a deficient number, since it is larger than the sum of its proper divisors (1).

220394189 is an equidigital number, since it uses as much as digits as its factorization.

220394189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 220394189 is about 14845.6791356947. The cubic root of 220394189 is about 604.0414107318.

The spelling of 220394189 in words is "two hundred twenty million, three hundred ninety-four thousand, one hundred eighty-nine".