208399099 has 2 divisors, whose sum is σ = 208399100. Its totient is φ = 208399098.

The previous prime is 208399097. The next prime is 208399111. The reversal of 208399099 is 990993802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208399099 - 2¹ = 208399097 is a prime.

Together with 208399097, 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 (208399091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104199549 + 104199550.

It is an arithmetic number, because the mean of its divisors is an integer number (104199550).

Almost surely, 2^208399099 is an apocalyptic number.

208399099 is a deficient number, since it is larger than the sum of its proper divisors (1).

208399099 is an equidigital number, since it uses as much as digits as its factorization.

208399099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 208399099 is about 14436.0347394982. The cubic root of 208399099 is about 592.8779232415.

The spelling of 208399099 in words is "two hundred eight million, three hundred ninety-nine thousand, ninety-nine".