208209202543 has 2 divisors, whose sum is σ = 208209202544. Its totient is φ = 208209202542.

The previous prime is 208209202493. The next prime is 208209202681. The reversal of 208209202543 is 345202902802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208209202543 - 2⁹ = 208209202031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208209212543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104104601271 + 104104601272.

It is an arithmetic number, because the mean of its divisors is an integer number (104104601272).

Almost surely, 2^208209202543 is an apocalyptic number.

208209202543 is a deficient number, since it is larger than the sum of its proper divisors (1).

208209202543 is an equidigital number, since it uses as much as digits as its factorization.

208209202543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 208209202543 in words is "two hundred eight billion, two hundred nine million, two hundred two thousand, five hundred forty-three".