918223 has 2 divisors, whose sum is σ = 918224. Its totient is φ = 918222.

The previous prime is 918209. The next prime is 918257. The reversal of 918223 is 322819.

918223 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 is a cyclic number.

It is not a de Polignac number, because 918223 - 2¹³ = 910031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459111 + 459112.

It is an arithmetic number, because the mean of its divisors is an integer number (459112).

2⁹¹⁸²²³ is an apocalyptic number.

918223 is a deficient number, since it is larger than the sum of its proper divisors (1).

918223 is an equidigital number, since it uses as much as digits as its factorization.

918223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 918223 is about 958.2395316412. The cubic root of 918223 is about 97.1962230464.

The spelling of 918223 in words is "nine hundred eighteen thousand, two hundred twenty-three".