205045417 has 2 divisors, whose sum is σ = 205045418. Its totient is φ = 205045416.

The previous prime is 205045403. The next prime is 205045429. The reversal of 205045417 is 714540502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198133776 + 6911641 = 14076^2 + 2629^2 .

It is a cyclic number.

It is not a de Polignac number, because 205045417 - 2⁷ = 205045289 is a prime.

It is not a weakly prime, because it can be changed into another prime (205045117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102522708 + 102522709.

It is an arithmetic number, because the mean of its divisors is an integer number (102522709).

Almost surely, 2^205045417 is an apocalyptic number.

It is an amenable number.

205045417 is a deficient number, since it is larger than the sum of its proper divisors (1).

205045417 is an equidigital number, since it uses as much as digits as its factorization.

205045417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 205045417 is about 14319.4070058784. The cubic root of 205045417 is about 589.6803947444.

Adding to 205045417 its reverse (714540502), we get a palindrome (919585919).

It can be divided in two parts, 20504 and 5417, that added together give a square (25921 = 161²).

The spelling of 205045417 in words is "two hundred five million, forty-five thousand, four hundred seventeen".