222668917 has 2 divisors, whose sum is σ = 222668918. Its totient is φ = 222668916.

The previous prime is 222668899. The next prime is 222668947. The reversal of 222668917 is 719866222.

222668917 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., 111703761 + 110965156 = 10569^2 + 10534^2 .

It is a cyclic number.

It is not a de Polignac number, because 222668917 - 2¹⁵ = 222636149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222668947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111334458 + 111334459.

It is an arithmetic number, because the mean of its divisors is an integer number (111334459).

Almost surely, 2^222668917 is an apocalyptic number.

It is an amenable number.

222668917 is a deficient number, since it is larger than the sum of its proper divisors (1).

222668917 is an equidigital number, since it uses as much as digits as its factorization.

222668917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 222668917 is about 14922.0949266516. The cubic root of 222668917 is about 606.1124417843.

The spelling of 222668917 in words is "two hundred twenty-two million, six hundred sixty-eight thousand, nine hundred seventeen".