818023 has 4 divisors (see below), whose sum is σ = 866160. Its totient is φ = 769888.

The previous prime is 818021. The next prime is 818093. The reversal of 818023 is 320818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320818 = 2 ⋅160409.

It is a cyclic number.

It is not a de Polignac number, because 818023 - 2¹ = 818021 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 817985 and 818003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818021) 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 in 3 ways as a sum of consecutive naturals, for example, 24043 + ... + 24076.

It is an arithmetic number, because the mean of its divisors is an integer number (216540).

2⁸¹⁸⁰²³ is an apocalyptic number.

818023 is a deficient number, since it is larger than the sum of its proper divisors (48137).

818023 is a wasteful number, since it uses less digits than its factorization.

818023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48136.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 818023 is about 904.4462394195. The cubic root of 818023 is about 93.5237340494.

The spelling of 818023 in words is "eight hundred eighteen thousand, twenty-three".