206308601 has 2 divisors, whose sum is σ = 206308602. Its totient is φ = 206308600.

The previous prime is 206308577. The next prime is 206308603. The reversal of 206308601 is 106803602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186049600 + 20259001 = 13640^2 + 4501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206308601 is a prime.

It is a Sophie Germain prime.

Together with 206308603, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (206308603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103154300 + 103154301.

It is an arithmetic number, because the mean of its divisors is an integer number (103154301).

Almost surely, 2^206308601 is an apocalyptic number.

It is an amenable number.

206308601 is a deficient number, since it is larger than the sum of its proper divisors (1).

206308601 is an equidigital number, since it uses as much as digits as its factorization.

206308601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 206308601 is about 14363.4466963887. The cubic root of 206308601 is about 590.8888269407. Note that the first 4 decimals are identical.

The spelling of 206308601 in words is "two hundred six million, three hundred eight thousand, six hundred one".