208799641 has 2 divisors, whose sum is σ = 208799642. Its totient is φ = 208799640.

The previous prime is 208799639. The next prime is 208799651. The reversal of 208799641 is 146997802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124545600 + 84254041 = 11160^2 + 9179^2 .

It is a cyclic number.

It is not a de Polignac number, because 208799641 - 2¹ = 208799639 is a prime.

Together with 208799639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 208799591 and 208799600.

It is not a weakly prime, because it can be changed into another prime (208799611) 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 as a sum of consecutive naturals, namely, 104399820 + 104399821.

It is an arithmetic number, because the mean of its divisors is an integer number (104399821).

Almost surely, 2^208799641 is an apocalyptic number.

It is an amenable number.

208799641 is a deficient number, since it is larger than the sum of its proper divisors (1).

208799641 is an equidigital number, since it uses as much as digits as its factorization.

208799641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 208799641 is about 14449.9010723257. The cubic root of 208799641 is about 593.2575162631.

The spelling of 208799641 in words is "two hundred eight million, seven hundred ninety-nine thousand, six hundred forty-one".