208270189 has 2 divisors, whose sum is σ = 208270190. Its totient is φ = 208270188.

The previous prime is 208270159. The next prime is 208270273. The reversal of 208270189 is 981072802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146773225 + 61496964 = 12115^2 + 7842^2 .

It is a cyclic number.

It is not a de Polignac number, because 208270189 - 2⁷ = 208270061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208270109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104135094 + 104135095.

It is an arithmetic number, because the mean of its divisors is an integer number (104135095).

Almost surely, 2^208270189 is an apocalyptic number.

It is an amenable number.

208270189 is a deficient number, since it is larger than the sum of its proper divisors (1).

208270189 is an equidigital number, since it uses as much as digits as its factorization.

208270189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 208270189 is about 14431.5691800996. The cubic root of 208270189 is about 592.7556519879.

The spelling of 208270189 in words is "two hundred eight million, two hundred seventy thousand, one hundred eighty-nine".