207120217 has 2 divisors, whose sum is σ = 207120218. Its totient is φ = 207120216.

The previous prime is 207120181. The next prime is 207120223. The reversal of 207120217 is 712021702.

207120217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203804176 + 3316041 = 14276^2 + 1821^2 .

It is a cyclic number.

It is not a de Polignac number, because 207120217 - 2¹¹ = 207118169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (207120257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103560108 + 103560109.

It is an arithmetic number, because the mean of its divisors is an integer number (103560109).

Almost surely, 2^207120217 is an apocalyptic number.

It is an amenable number.

207120217 is a deficient number, since it is larger than the sum of its proper divisors (1).

207120217 is an equidigital number, since it uses as much as digits as its factorization.

207120217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 207120217 is about 14391.6717930892. The cubic root of 207120217 is about 591.6626633422.

Adding to 207120217 its reverse (712021702), we get a palindrome (919141919).

The spelling of 207120217 in words is "two hundred seven million, one hundred twenty thousand, two hundred seventeen".