818123 has 2 divisors, whose sum is σ = 818124. Its totient is φ = 818122.

The previous prime is 818113. The next prime is 818143. The reversal of 818123 is 321818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 818123 - 2⁸ = 817867 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (818113) 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, 409061 + 409062.

It is an arithmetic number, because the mean of its divisors is an integer number (409062).

2⁸¹⁸¹²³ is an apocalyptic number.

818123 is a deficient number, since it is larger than the sum of its proper divisors (1).

818123 is an equidigital number, since it uses as much as digits as its factorization.

818123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

The square root of 818123 is about 904.5015201756. The cubic root of 818123 is about 93.5275448601.

The spelling of 818123 in words is "eight hundred eighteen thousand, one hundred twenty-three".