819423 has 32 divisors (see below), whose sum is σ = 1382400. Its totient is φ = 475200.

The previous prime is 819419. The next prime is 819431. The reversal of 819423 is 324918.

819423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 819423 - 2² = 819419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 819423.

It is not an unprimeable number, because it can be changed into a prime (819443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9163 + ... + 9251.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2⁸¹⁹⁴²³ is an apocalyptic number.

819423 is a deficient number, since it is larger than the sum of its proper divisors (562977).

819423 is a wasteful number, since it uses less digits than its factorization.

819423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 134 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 819423 is about 905.2198627958. The cubic root of 819423 is about 93.5770571644.

The spelling of 819423 in words is "eight hundred nineteen thousand, four hundred twenty-three".