208216683 has 12 divisors (see below), whose sum is σ = 308580280. Its totient is φ = 138761136.

The previous prime is 208216669. The next prime is 208216691. The reversal of 208216683 is 386612802.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 208216683 - 2¹⁴ = 208200299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208216633) 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 11 ways as a sum of consecutive naturals, for example, 73591 + ... + 76367.

Almost surely, 2^208216683 is an apocalyptic number.

208216683 is a deficient number, since it is larger than the sum of its proper divisors (100363597).

208216683 is an frugal number, since it uses more digits than its factorization.

208216683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563 (or 2780 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 208216683 is about 14429.7152778563. The cubic root of 208216683 is about 592.7048866808.

Multiplying 208216683 by its product of nonzero digits (27648), we get a square (5756774851584 = 2399328²).

It can be divided in two parts, 2082166 and 83, that added together give a square (2082249 = 1443²).

The spelling of 208216683 in words is "two hundred eight million, two hundred sixteen thousand, six hundred eighty-three".