208859897 has 2 divisors, whose sum is σ = 208859898. Its totient is φ = 208859896.

The previous prime is 208859891. The next prime is 208859923. The reversal of 208859897 is 798958802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189640441 + 19219456 = 13771^2 + 4384^2 .

It is a cyclic number.

It is not a de Polignac number, because 208859897 - 2⁸ = 208859641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (208859891) 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, 104429948 + 104429949.

It is an arithmetic number, because the mean of its divisors is an integer number (104429949).

Almost surely, 2^208859897 is an apocalyptic number.

It is an amenable number.

208859897 is a deficient number, since it is larger than the sum of its proper divisors (1).

208859897 is an equidigital number, since it uses as much as digits as its factorization.

208859897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The square root of 208859897 is about 14451.9859188971. The cubic root of 208859897 is about 593.3145787603.

The spelling of 208859897 in words is "two hundred eight million, eight hundred fifty-nine thousand, eight hundred ninety-seven".