8426643 has 4 divisors (see below), whose sum is σ = 11235528. Its totient is φ = 5617760.

The previous prime is 8426641. The next prime is 8426647. The reversal of 8426643 is 3466248.

8426643 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 8426643 - 2¹ = 8426641 is a prime.

It is a d-powerful number, because it can be written as 8³ + 4⁵ + 2²³ + 6³ + 6³ + 4⁷ + 3⁹ .

It is not an unprimeable number, because it can be changed into a prime (8426641) 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, 1404438 + ... + 1404443.

It is an arithmetic number, because the mean of its divisors is an integer number (2808882).

Almost surely, 2^8426643 is an apocalyptic number.

8426643 is a deficient number, since it is larger than the sum of its proper divisors (2808885).

8426643 is a wasteful number, since it uses less digits than its factorization.

8426643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808884.

The product of its digits is 27648, while the sum is 33.

The square root of 8426643 is about 2902.8680645183. The cubic root of 8426643 is about 203.4939639660.

The spelling of 8426643 in words is "eight million, four hundred twenty-six thousand, six hundred forty-three".