104206517 has 2 divisors, whose sum is σ = 104206518. Its totient is φ = 104206516.

The previous prime is 104206513. The next prime is 104206519. The reversal of 104206517 is 715602401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93876721 + 10329796 = 9689^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 104206517 - 2² = 104206513 is a prime.

Together with 104206519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104206513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52103258 + 52103259.

It is an arithmetic number, because the mean of its divisors is an integer number (52103259).

Almost surely, 2^104206517 is an apocalyptic number.

It is an amenable number.

104206517 is a deficient number, since it is larger than the sum of its proper divisors (1).

104206517 is an equidigital number, since it uses as much as digits as its factorization.

104206517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 104206517 is about 10208.1593345715. The cubic root of 104206517 is about 470.5780077498.

Adding to 104206517 its reverse (715602401), we get a palindrome (819808918).

The spelling of 104206517 in words is "one hundred four million, two hundred six thousand, five hundred seventeen".