206680697 has 2 divisors, whose sum is σ = 206680698. Its totient is φ = 206680696.

The previous prime is 206680687. The next prime is 206680699. The reversal of 206680697 is 796086602.

206680697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120209296 + 86471401 = 10964^2 + 9299^2 .

It is a cyclic number.

It is not a de Polignac number, because 206680697 - 2⁴ = 206680681 is a prime.

Together with 206680699, 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 (206680699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103340348 + 103340349.

It is an arithmetic number, because the mean of its divisors is an integer number (103340349).

Almost surely, 2^206680697 is an apocalyptic number.

It is an amenable number.

206680697 is a deficient number, since it is larger than the sum of its proper divisors (1).

206680697 is an equidigital number, since it uses as much as digits as its factorization.

206680697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 206680697 is about 14376.3937411299. The cubic root of 206680697 is about 591.2438538546.

The spelling of 206680697 in words is "two hundred six million, six hundred eighty thousand, six hundred ninety-seven".