208534819 has 2 divisors, whose sum is σ = 208534820. Its totient is φ = 208534818.

The previous prime is 208534811. The next prime is 208534841. The reversal of 208534819 is 918435802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208534819 - 2³ = 208534811 is a prime.

It is a super-2 number, since 2×208534819² = 86973541470725522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208534811) 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, 104267409 + 104267410.

It is an arithmetic number, because the mean of its divisors is an integer number (104267410).

Almost surely, 2^208534819 is an apocalyptic number.

208534819 is a deficient number, since it is larger than the sum of its proper divisors (1).

208534819 is an equidigital number, since it uses as much as digits as its factorization.

208534819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 208534819 is about 14440.7347112257. The cubic root of 208534819 is about 593.0065993102.

The spelling of 208534819 in words is "two hundred eight million, five hundred thirty-four thousand, eight hundred nineteen".