208819229 has 2 divisors, whose sum is σ = 208819230. Its totient is φ = 208819228.

The previous prime is 208819189. The next prime is 208819241. The reversal of 208819229 is 922918802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177156100 + 31663129 = 13310^2 + 5627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208819229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208819129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104409614 + 104409615.

It is an arithmetic number, because the mean of its divisors is an integer number (104409615).

Almost surely, 2^208819229 is an apocalyptic number.

It is an amenable number.

208819229 is a deficient number, since it is larger than the sum of its proper divisors (1).

208819229 is an equidigital number, since it uses as much as digits as its factorization.

208819229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 208819229 is about 14450.5788465376. The cubic root of 208819229 is about 593.2760673245.

The spelling of 208819229 in words is "two hundred eight million, eight hundred nineteen thousand, two hundred twenty-nine".