206696417 has 2 divisors, whose sum is σ = 206696418. Its totient is φ = 206696416.

The previous prime is 206696381. The next prime is 206696419. The reversal of 206696417 is 714696602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189090001 + 17606416 = 13751^2 + 4196^2 .

It is a cyclic number.

It is not a de Polignac number, because 206696417 - 2¹⁰ = 206695393 is a prime.

Together with 206696419, 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 (206696419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103348208 + 103348209.

It is an arithmetic number, because the mean of its divisors is an integer number (103348209).

Almost surely, 2^206696417 is an apocalyptic number.

It is an amenable number.

206696417 is a deficient number, since it is larger than the sum of its proper divisors (1).

206696417 is an equidigital number, since it uses as much as digits as its factorization.

206696417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 206696417 is about 14376.9404603344. The cubic root of 206696417 is about 591.2588433495.

The spelling of 206696417 in words is "two hundred six million, six hundred ninety-six thousand, four hundred seventeen".