423789 has 4 divisors (see below), whose sum is σ = 565056. Its totient is φ = 282524.

The previous prime is 423781. The next prime is 423791. The reversal of 423789 is 987324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 423789 - 2³ = 423781 is a prime.

It is a super-3 number, since 3×423789³ = 228333847239954207, which contains 333 as substring.

It is a D-number.

423789 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423789.

It is not an unprimeable number, because it can be changed into a prime (423781) 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, 70629 + ... + 70634.

It is an arithmetic number, because the mean of its divisors is an integer number (141264).

423789 is a Friedman number, since it can be written as (93*7)^2-8-4, using all its digits and the basic arithmetic operations.

2⁴²³⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

423789 is a deficient number, since it is larger than the sum of its proper divisors (141267).

423789 is a wasteful number, since it uses less digits than its factorization.

423789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141266.

The product of its digits is 12096, while the sum is 33.

The square root of 423789 is about 650.9907833449. The cubic root of 423789 is about 75.1132511252.

The spelling of 423789 in words is "four hundred twenty-three thousand, seven hundred eighty-nine".