8423643 has 4 divisors (see below), whose sum is σ = 11231528. Its totient is φ = 5615760.

The previous prime is 8423621. The next prime is 8423651. The reversal of 8423643 is 3463248.

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

It is not a de Polignac number, because 8423643 - 2¹² = 8419547 is a prime.

It is a super-2 number, since 2×8423643² = 141915522782898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8423643.

It is not an unprimeable number, because it can be changed into a prime (8423603) 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, 1403938 + ... + 1403943.

It is an arithmetic number, because the mean of its divisors is an integer number (2807882).

Almost surely, 2^8423643 is an apocalyptic number.

8423643 is a deficient number, since it is larger than the sum of its proper divisors (2807885).

8423643 is a wasteful number, since it uses less digits than its factorization.

8423643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807884.

The product of its digits is 13824, while the sum is 30.

The square root of 8423643 is about 2902.3512881800. The cubic root of 8423643 is about 203.4698122229.

The spelling of 8423643 in words is "eight million, four hundred twenty-three thousand, six hundred forty-three".