208968197 has 2 divisors, whose sum is σ = 208968198. Its totient is φ = 208968196.

The previous prime is 208968181. The next prime is 208968203. The reversal of 208968197 is 791869802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167159041 + 41809156 = 12929^2 + 6466^2 .

It is a cyclic number.

It is not a de Polignac number, because 208968197 - 2⁴ = 208968181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208968497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104484098 + 104484099.

It is an arithmetic number, because the mean of its divisors is an integer number (104484099).

Almost surely, 2^208968197 is an apocalyptic number.

It is an amenable number.

208968197 is a deficient number, since it is larger than the sum of its proper divisors (1).

208968197 is an equidigital number, since it uses as much as digits as its factorization.

208968197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 208968197 is about 14455.7323231997. The cubic root of 208968197 is about 593.4171113938.

The spelling of 208968197 in words is "two hundred eight million, nine hundred sixty-eight thousand, one hundred ninety-seven".