208690301 has 2 divisors, whose sum is σ = 208690302. Its totient is φ = 208690300.

The previous prime is 208690289. The next prime is 208690373. The reversal of 208690301 is 103096802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193488100 + 15202201 = 13910^2 + 3899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208690301 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208690501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104345150 + 104345151.

It is an arithmetic number, because the mean of its divisors is an integer number (104345151).

Almost surely, 2^208690301 is an apocalyptic number.

208690301 is the 6461-st centered decagonal number.

It is an amenable number.

208690301 is a deficient number, since it is larger than the sum of its proper divisors (1).

208690301 is an equidigital number, since it uses as much as digits as its factorization.

208690301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 208690301 is about 14446.1171599845. The cubic root of 208690301 is about 593.1539431239.

The spelling of 208690301 in words is "two hundred eight million, six hundred ninety thousand, three hundred one".