208710705543 has 4 divisors (see below), whose sum is σ = 278280940728. Its totient is φ = 139140470360.

The previous prime is 208710705521. The next prime is 208710705547. The reversal of 208710705543 is 345507017802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 208710705543 - 2³³ = 200120770951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 208710705495 and 208710705504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208710705547) 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 in 3 ways as a sum of consecutive naturals, for example, 34785117588 + ... + 34785117593.

It is an arithmetic number, because the mean of its divisors is an integer number (69570235182).

Almost surely, 2^208710705543 is an apocalyptic number.

208710705543 is a deficient number, since it is larger than the sum of its proper divisors (69570235185).

208710705543 is an equidigital number, since it uses as much as digits as its factorization.

208710705543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69570235184.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 208710705543 in words is "two hundred eight billion, seven hundred ten million, seven hundred five thousand, five hundred forty-three".