208564963 has 2 divisors, whose sum is σ = 208564964. Its totient is φ = 208564962.

The previous prime is 208564927. The next prime is 208565011. The reversal of 208564963 is 369465802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208564963 - 2⁹ = 208564451 is a prime.

It is not a weakly prime, because it can be changed into another prime (208567963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104282481 + 104282482.

It is an arithmetic number, because the mean of its divisors is an integer number (104282482).

Almost surely, 2^208564963 is an apocalyptic number.

208564963 is a deficient number, since it is larger than the sum of its proper divisors (1).

208564963 is an equidigital number, since it uses as much as digits as its factorization.

208564963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 208564963 is about 14441.7783877194. The cubic root of 208564963 is about 593.0351712449.

The spelling of 208564963 in words is "two hundred eight million, five hundred sixty-four thousand, nine hundred sixty-three".