8405423 has 4 divisors (see below), whose sum is σ = 9052008. Its totient is φ = 7758840.

The previous prime is 8405417. The next prime is 8405431. The reversal of 8405423 is 3245048.

8405423 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8405423 - 2⁴ = 8405407 is a prime.

It is a super-2 number, since 2×8405423² = 141302271617858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8405392 and 8405401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8405473) 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, 323273 + ... + 323298.

It is an arithmetic number, because the mean of its divisors is an integer number (2263002).

Almost surely, 2^8405423 is an apocalyptic number.

8405423 is a deficient number, since it is larger than the sum of its proper divisors (646585).

8405423 is a wasteful number, since it uses less digits than its factorization.

8405423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646584.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 8405423 is about 2899.2107546710. The cubic root of 8405423 is about 203.3230073289.

The spelling of 8405423 in words is "eight million, four hundred five thousand, four hundred twenty-three".