208703861 has 16 divisors (see below), whose sum is σ = 218107008. Its totient is φ = 199584000.

The previous prime is 208703813. The next prime is 208703867. The reversal of 208703861 is 168307802.

It is a cyclic number.

It is not a de Polignac number, because 208703861 - 2¹⁴ = 208687477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208703867) 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 15 ways as a sum of consecutive naturals, for example, 346961 + ... + 347561.

It is an arithmetic number, because the mean of its divisors is an integer number (13631688).

Almost surely, 2^208703861 is an apocalyptic number.

It is an amenable number.

208703861 is a deficient number, since it is larger than the sum of its proper divisors (9403147).

208703861 is an equidigital number, since it uses as much as digits as its factorization.

208703861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 208703861 is about 14446.5864826263. The cubic root of 208703861 is about 593.1667899009.

The spelling of 208703861 in words is "two hundred eight million, seven hundred three thousand, eight hundred sixty-one".