206375317 has 2 divisors, whose sum is σ = 206375318. Its totient is φ = 206375316.

The previous prime is 206375303. The next prime is 206375327. The reversal of 206375317 is 713573602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193515921 + 12859396 = 13911^2 + 3586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206375317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206375327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103187658 + 103187659.

It is an arithmetic number, because the mean of its divisors is an integer number (103187659).

Almost surely, 2^206375317 is an apocalyptic number.

It is an amenable number.

206375317 is a deficient number, since it is larger than the sum of its proper divisors (1).

206375317 is an equidigital number, since it uses as much as digits as its factorization.

206375317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 206375317 is about 14365.7689317349. The cubic root of 206375317 is about 590.9525138805.

The spelling of 206375317 in words is "two hundred six million, three hundred seventy-five thousand, three hundred seventeen".