208385797 has 2 divisors, whose sum is σ = 208385798. Its totient is φ = 208385796.

The previous prime is 208385777. The next prime is 208385803. The reversal of 208385797 is 797583802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201384481 + 7001316 = 14191^2 + 2646^2 .

It is a cyclic number.

It is not a de Polignac number, because 208385797 - 2¹⁹ = 207861509 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208385797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208385707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104192898 + 104192899.

It is an arithmetic number, because the mean of its divisors is an integer number (104192899).

Almost surely, 2^208385797 is an apocalyptic number.

It is an amenable number.

208385797 is a deficient number, since it is larger than the sum of its proper divisors (1).

208385797 is an equidigital number, since it uses as much as digits as its factorization.

208385797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 208385797 is about 14435.5740100628. The cubic root of 208385797 is about 592.8653086157.

The spelling of 208385797 in words is "two hundred eight million, three hundred eighty-five thousand, seven hundred ninety-seven".