2220917 has 2 divisors, whose sum is σ = 2220918. Its totient is φ = 2220916.

The previous prime is 2220913. The next prime is 2220919. The reversal of 2220917 is 7190222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2193361 + 27556 = 1481^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220917 - 2² = 2220913 is a prime.

Together with 2220919, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220892 and 2220901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220913) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110458 + 1110459.

It is an arithmetic number, because the mean of its divisors is an integer number (1110459).

2^2220917 is an apocalyptic number.

It is an amenable number.

2220917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220917 is an equidigital number, since it uses as much as digits as its factorization.

2220917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2220917 is about 1490.2741358555. The cubic root of 2220917 is about 130.4700341741.

The spelling of 2220917 in words is "two million, two hundred twenty thousand, nine hundred seventeen".