9120217 has 2 divisors, whose sum is σ = 9120218. Its totient is φ = 9120216.

The previous prime is 9120203. The next prime is 9120233. The reversal of 9120217 is 7120219.

9120217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8128201 + 992016 = 2851^2 + 996^2 .

It is an emirp because it is prime and its reverse (7120219) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9120217 is a prime.

9120217 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9120277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560108 + 4560109.

It is an arithmetic number, because the mean of its divisors is an integer number (4560109).

Almost surely, 2^9120217 is an apocalyptic number.

It is an amenable number.

9120217 is a deficient number, since it is larger than the sum of its proper divisors (1).

9120217 is an equidigital number, since it uses as much as digits as its factorization.

9120217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 9120217 is about 3019.9697018348. The cubic root of 9120217 is about 208.9304424254.

It can be divided in two parts, 91202 and 17, that added together give a palindrome (91219).

The spelling of 9120217 in words is "nine million, one hundred twenty thousand, two hundred seventeen".