208446881 has 4 divisors (see below), whose sum is σ = 209044500. Its totient is φ = 207849264.

The previous prime is 208446871. The next prime is 208446899. The reversal of 208446881 is 188644802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188644802 = 2 ⋅94322401.

It can be written as a sum of positive squares in 2 ways, for example, as 117072400 + 91374481 = 10820^2 + 9559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208446881 is a prime.

It is a super-2 number, since 2×208446881² = 86900204397256322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208446871) 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, 298286 + ... + 298983.

It is an arithmetic number, because the mean of its divisors is an integer number (52261125).

Almost surely, 2^208446881 is an apocalyptic number.

It is an amenable number.

208446881 is a deficient number, since it is larger than the sum of its proper divisors (597619).

208446881 is an equidigital number, since it uses as much as digits as its factorization.

208446881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597618.

The product of its (nonzero) digits is 98304, while the sum is 41.

The square root of 208446881 is about 14437.6896004866. The cubic root of 208446881 is about 592.9232317037.

The spelling of 208446881 in words is "two hundred eight million, four hundred forty-six thousand, eight hundred eighty-one".