208956841 has 2 divisors, whose sum is σ = 208956842. Its totient is φ = 208956840.

The previous prime is 208956773. The next prime is 208956859. The reversal of 208956841 is 148659802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114575616 + 94381225 = 10704^2 + 9715^2 .

It is a cyclic number.

It is not a de Polignac number, because 208956841 - 2¹⁵ = 208924073 is a prime.

It is a super-2 number, since 2×208956841² = 87325922801398562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208956641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104478420 + 104478421.

It is an arithmetic number, because the mean of its divisors is an integer number (104478421).

Almost surely, 2^208956841 is an apocalyptic number.

It is an amenable number.

208956841 is a deficient number, since it is larger than the sum of its proper divisors (1).

208956841 is an equidigital number, since it uses as much as digits as its factorization.

208956841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 208956841 is about 14455.3395325049. The cubic root of 208956841 is about 593.4063618047.

The spelling of 208956841 in words is "two hundred eight million, nine hundred fifty-six thousand, eight hundred forty-one".