223239917 has 2 divisors, whose sum is σ = 223239918. Its totient is φ = 223239916.

The previous prime is 223239901. The next prime is 223239953. The reversal of 223239917 is 719932322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194574601 + 28665316 = 13949^2 + 5354^2 .

It is a cyclic number.

It is not a de Polignac number, because 223239917 - 2⁴ = 223239901 is a prime.

It is a super-3 number, since 3×223239917³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223239017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111619958 + 111619959.

It is an arithmetic number, because the mean of its divisors is an integer number (111619959).

Almost surely, 2^223239917 is an apocalyptic number.

It is an amenable number.

223239917 is a deficient number, since it is larger than the sum of its proper divisors (1).

223239917 is an equidigital number, since it uses as much as digits as its factorization.

223239917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 223239917 is about 14941.2153789442. The cubic root of 223239917 is about 606.6300934291.

The spelling of 223239917 in words is "two hundred twenty-three million, two hundred thirty-nine thousand, nine hundred seventeen".