208409219 has 2 divisors, whose sum is σ = 208409220. Its totient is φ = 208409218.

The previous prime is 208409207. The next prime is 208409231. The reversal of 208409219 is 912904802.

It is a balanced prime because it is at equal distance from previous prime (208409207) and next prime (208409231).

It is a cyclic number.

It is not a de Polignac number, because 208409219 - 2⁴ = 208409203 is a prime.

It is a super-2 number, since 2×208409219² = 86868805128379922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (208409269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104204609 + 104204610.

It is an arithmetic number, because the mean of its divisors is an integer number (104204610).

Almost surely, 2^208409219 is an apocalyptic number.

208409219 is a deficient number, since it is larger than the sum of its proper divisors (1).

208409219 is an equidigital number, since it uses as much as digits as its factorization.

208409219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 208409219 is about 14436.3852470070. The cubic root of 208409219 is about 592.8875199360.

The spelling of 208409219 in words is "two hundred eight million, four hundred nine thousand, two hundred nineteen".