100641217 has 2 divisors, whose sum is σ = 100641218. Its totient is φ = 100641216.

The previous prime is 100641187. The next prime is 100641251. The reversal of 100641217 is 712146001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55965361 + 44675856 = 7481^2 + 6684^2 .

It is a cyclic number.

It is not a de Polignac number, because 100641217 - 2¹⁵ = 100608449 is a prime.

It is not a weakly prime, because it can be changed into another prime (100641287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50320608 + 50320609.

It is an arithmetic number, because the mean of its divisors is an integer number (50320609).

Almost surely, 2^100641217 is an apocalyptic number.

It is an amenable number.

100641217 is a deficient number, since it is larger than the sum of its proper divisors (1).

100641217 is an equidigital number, since it uses as much as digits as its factorization.

100641217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 100641217 is about 10032.0096192139. The cubic root of 100641217 is about 465.1488589585.

Adding to 100641217 its reverse (712146001), we get a palindrome (812787218).

The spelling of 100641217 in words is "one hundred million, six hundred forty-one thousand, two hundred seventeen".