208600001 has 2 divisors, whose sum is σ = 208600002. Its totient is φ = 208600000.

The previous prime is 208599991. The next prime is 208600003. The reversal of 208600001 is 100006802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173185600 + 35414401 = 13160^2 + 5951^2 .

It is a cyclic number.

It is not a de Polignac number, because 208600001 - 2²² = 204405697 is a prime.

Together with 208600003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (208600003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104300000 + 104300001.

It is an arithmetic number, because the mean of its divisors is an integer number (104300001).

Almost surely, 2^208600001 is an apocalyptic number.

It is an amenable number.

208600001 is a deficient number, since it is larger than the sum of its proper divisors (1).

208600001 is an equidigital number, since it uses as much as digits as its factorization.

208600001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 208600001 is about 14442.9914145235. The cubic root of 208600001 is about 593.0683784889.

Adding to 208600001 its reverse (100006802), we get a palindrome (308606803).

The spelling of 208600001 in words is "two hundred eight million, six hundred thousand, one".