818423 has 4 divisors (see below), whose sum is σ = 823608. Its totient is φ = 813240.

The previous prime is 818413. The next prime is 818429. The reversal of 818423 is 324818.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 818423 - 2⁶ = 818359 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 818392 and 818401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2348 + ... + 2673.

It is an arithmetic number, because the mean of its divisors is an integer number (205902).

2⁸¹⁸⁴²³ is an apocalyptic number.

818423 is a deficient number, since it is larger than the sum of its proper divisors (5185).

818423 is a wasteful number, since it uses less digits than its factorization.

818423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184.

The product of its digits is 1536, while the sum is 26.

The square root of 818423 is about 904.6673421761. The cubic root of 818423 is about 93.5389754292.

The spelling of 818423 in words is "eight hundred eighteen thousand, four hundred twenty-three".