2120317 has 2 divisors, whose sum is σ = 2120318. Its totient is φ = 2120316.

The previous prime is 2120309. The next prime is 2120329. The reversal of 2120317 is 7130212.

It is a happy number.

2120317 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., 1692601 + 427716 = 1301^2 + 654^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120317 - 2³ = 2120309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060158 + 1060159.

It is an arithmetic number, because the mean of its divisors is an integer number (1060159).

2^2120317 is an apocalyptic number.

It is an amenable number.

2120317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120317 is an equidigital number, since it uses as much as digits as its factorization.

2120317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2120317 is about 1456.1308320340. The cubic root of 2120317 is about 128.4695684118.

Adding to 2120317 its reverse (7130212), we get a palindrome (9250529).

The spelling of 2120317 in words is "two million, one hundred twenty thousand, three hundred seventeen".