208964291 has 2 divisors, whose sum is σ = 208964292. Its totient is φ = 208964290.

The previous prime is 208964281. The next prime is 208964293. The reversal of 208964291 is 192469802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208964291 - 2¹⁰ = 208963267 is a prime.

It is a Sophie Germain prime.

Together with 208964293, 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 (208964293) 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, 104482145 + 104482146.

It is an arithmetic number, because the mean of its divisors is an integer number (104482146).

Almost surely, 2^208964291 is an apocalyptic number.

208964291 is a deficient number, since it is larger than the sum of its proper divisors (1).

208964291 is an equidigital number, since it uses as much as digits as its factorization.

208964291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 208964291 is about 14455.5972204541. The cubic root of 208964291 is about 593.4134140183.

The spelling of 208964291 in words is "two hundred eight million, nine hundred sixty-four thousand, two hundred ninety-one".