868123 has 2 divisors, whose sum is σ = 868124. Its totient is φ = 868122.

The previous prime is 868121. The next prime is 868151. The reversal of 868123 is 321868.

It is an a-pointer prime, because the next prime (868151) can be obtained adding 868123 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 868123 - 2¹ = 868121 is a prime.

Together with 868121, it forms a pair of twin primes.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 868091 and 868100.

It is not a weakly prime, because it can be changed into another prime (868121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434061 + 434062.

It is an arithmetic number, because the mean of its divisors is an integer number (434062).

2⁸⁶⁸¹²³ is an apocalyptic number.

868123 is a deficient number, since it is larger than the sum of its proper divisors (1).

868123 is an equidigital number, since it uses as much as digits as its factorization.

868123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 868123 is about 931.7311844089. The cubic root of 868123 is about 95.3953240298.

The spelling of 868123 in words is "eight hundred sixty-eight thousand, one hundred twenty-three".