208834289 has 2 divisors, whose sum is σ = 208834290. Its totient is φ = 208834288.

The previous prime is 208834277. The next prime is 208834291. The reversal of 208834289 is 982438802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182466064 + 26368225 = 13508^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 208834289 - 2¹⁶ = 208768753 is a prime.

It is a super-2 number, since 2×208834289² = 87223520524271042, which contains 22 as substring.

Together with 208834291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (208834229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104417144 + 104417145.

It is an arithmetic number, because the mean of its divisors is an integer number (104417145).

Almost surely, 2^208834289 is an apocalyptic number.

It is an amenable number.

208834289 is a deficient number, since it is larger than the sum of its proper divisors (1).

208834289 is an equidigital number, since it uses as much as digits as its factorization.

208834289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 208834289 is about 14451.0999235352. The cubic root of 208834289 is about 593.2903292977.

The spelling of 208834289 in words is "two hundred eight million, eight hundred thirty-four thousand, two hundred eighty-nine".