8390423 has 4 divisors (see below), whose sum is σ = 8755248. Its totient is φ = 8025600.

The previous prime is 8390413. The next prime is 8390441. The reversal of 8390423 is 3240938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3240938 = 2 ⋅1620469.

It is a cyclic number.

It is not a de Polignac number, because 8390423 - 2⁶ = 8390359 is a prime.

It is a d-powerful number, because it can be written as 8³ + 3³ + 9 + 0 + 4⁵ + 2²³ + 3⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8390413) 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, 182378 + ... + 182423.

It is an arithmetic number, because the mean of its divisors is an integer number (2188812).

Almost surely, 2^8390423 is an apocalyptic number.

8390423 is a deficient number, since it is larger than the sum of its proper divisors (364825).

8390423 is a wasteful number, since it uses less digits than its factorization.

8390423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364824.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 8390423 is about 2896.6226885806. The cubic root of 8390423 is about 203.2019877949.

The spelling of 8390423 in words is "eight million, three hundred ninety thousand, four hundred twenty-three".