208441091 has 4 divisors (see below), whose sum is σ = 214074672. Its totient is φ = 202807512.

The previous prime is 208441033. The next prime is 208441109. The reversal of 208441091 is 190144802.

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 208441091 - 2¹⁸ = 208178947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208441031) 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, 2816735 + ... + 2816808.

It is an arithmetic number, because the mean of its divisors is an integer number (53518668).

Almost surely, 2^208441091 is an apocalyptic number.

208441091 is a deficient number, since it is larger than the sum of its proper divisors (5633581).

208441091 is an equidigital number, since it uses as much as digits as its factorization.

208441091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5633580.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 208441091 is about 14437.4890822470. The cubic root of 208441091 is about 592.9177418042.

Adding to 208441091 its reverse (190144802), we get a palindrome (398585893).

The spelling of 208441091 in words is "two hundred eight million, four hundred forty-one thousand, ninety-one".