4218917 has 2 divisors, whose sum is σ = 4218918. Its totient is φ = 4218916.

The previous prime is 4218901. The next prime is 4218947. The reversal of 4218917 is 7198124.

It is a Cunningham number, because it is equal to 2054²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4218916 + 1 = 2054^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 4218917 - 2⁴ = 4218901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4218947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109458 + 2109459.

It is an arithmetic number, because the mean of its divisors is an integer number (2109459).

Almost surely, 2^4218917 is an apocalyptic number.

It is an amenable number.

4218917 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218917 is an equidigital number, since it uses as much as digits as its factorization.

4218917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 4218917 is about 2054.0002434274. Note that the first 3 decimals coincide. The cubic root of 4218917 is about 161.5847338167.

The spelling of 4218917 in words is "four million, two hundred eighteen thousand, nine hundred seventeen".