8446643 has 4 divisors (see below), whose sum is σ = 8513280. Its totient is φ = 8380008.

The previous prime is 8446639. The next prime is 8446649. The reversal of 8446643 is 3466448.

It is a happy number.

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 8446643 - 2² = 8446639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8446649) 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, 33128 + ... + 33381.

It is an arithmetic number, because the mean of its divisors is an integer number (2128320).

Almost surely, 2^8446643 is an apocalyptic number.

8446643 is a deficient number, since it is larger than the sum of its proper divisors (66637).

8446643 is a wasteful number, since it uses less digits than its factorization.

8446643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66636.

The product of its digits is 55296, while the sum is 35.

The square root of 8446643 is about 2906.3108918352. The cubic root of 8446643 is about 203.6548292781.

The spelling of 8446643 in words is "eight million, four hundred forty-six thousand, six hundred forty-three".