6408643 has 8 divisors (see below), whose sum is σ = 7143120. Its totient is φ = 5713920.

The previous prime is 6408637. The next prime is 6408653. The reversal of 6408643 is 3468046.

6408643 is nontrivially palindromic in base 2.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6408643 - 2⁹ = 6408131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6408653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9598 + ... + 10243.

It is an arithmetic number, because the mean of its divisors is an integer number (892890).

Almost surely, 2^6408643 is an apocalyptic number.

6408643 is a deficient number, since it is larger than the sum of its proper divisors (734477).

6408643 is a wasteful number, since it uses less digits than its factorization.

6408643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19877.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 6408643 is about 2531.5297746620. The cubic root of 6408643 is about 185.7470933587.

The spelling of 6408643 in words is "six million, four hundred eight thousand, six hundred forty-three".