206013317 has 2 divisors, whose sum is σ = 206013318. Its totient is φ = 206013316.

The previous prime is 206013253. The next prime is 206013319. The reversal of 206013317 is 713310602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178649956 + 27363361 = 13366^2 + 5231^2 .

It is a cyclic number.

It is not a de Polignac number, because 206013317 - 2⁶ = 206013253 is a prime.

Together with 206013319, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206013292 and 206013301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206013319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103006658 + 103006659.

It is an arithmetic number, because the mean of its divisors is an integer number (103006659).

Almost surely, 2^206013317 is an apocalyptic number.

It is an amenable number.

206013317 is a deficient number, since it is larger than the sum of its proper divisors (1).

206013317 is an equidigital number, since it uses as much as digits as its factorization.

206013317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 206013317 is about 14353.1640065875. The cubic root of 206013317 is about 590.6067845301.

Adding to 206013317 its reverse (713310602), we get a palindrome (919323919).

The spelling of 206013317 in words is "two hundred six million, thirteen thousand, three hundred seventeen".