206054617 has 2 divisors, whose sum is σ = 206054618. Its totient is φ = 206054616.

The previous prime is 206054593. The next prime is 206054621. The reversal of 206054617 is 716450602.

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., 199063881 + 6990736 = 14109^2 + 2644^2 .

It is a cyclic number.

It is not a de Polignac number, because 206054617 - 2¹⁹ = 205530329 is a prime.

It is not a weakly prime, because it can be changed into another prime (206054647) 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, 103027308 + 103027309.

It is an arithmetic number, because the mean of its divisors is an integer number (103027309).

Almost surely, 2^206054617 is an apocalyptic number.

It is an amenable number.

206054617 is a deficient number, since it is larger than the sum of its proper divisors (1).

206054617 is an equidigital number, since it uses as much as digits as its factorization.

206054617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 206054617 is about 14354.6026416617. The cubic root of 206054617 is about 590.6462486948.

The spelling of 206054617 in words is "two hundred six million, fifty-four thousand, six hundred seventeen".