206090317 has 2 divisors, whose sum is σ = 206090318. Its totient is φ = 206090316.

The previous prime is 206090299. The next prime is 206090377. The reversal of 206090317 is 713090602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137100681 + 68989636 = 11709^2 + 8306^2 .

It is a cyclic number.

It is not a de Polignac number, because 206090317 - 2²³ = 197701709 is a prime.

It is a super-2 number, since 2×206090317² = 84946437522320978, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206090377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103045158 + 103045159.

It is an arithmetic number, because the mean of its divisors is an integer number (103045159).

Almost surely, 2^206090317 is an apocalyptic number.

It is an amenable number.

206090317 is a deficient number, since it is larger than the sum of its proper divisors (1).

206090317 is an equidigital number, since it uses as much as digits as its factorization.

206090317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 206090317 is about 14355.8460914012. The cubic root of 206090317 is about 590.6803575373.

The spelling of 206090317 in words is "two hundred six million, ninety thousand, three hundred seventeen".