6489643 has 4 divisors (see below), whose sum is σ = 6508080. Its totient is φ = 6471208.

The previous prime is 6489641. The next prime is 6489647. The reversal of 6489643 is 3469846.

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 6489643 - 2¹ = 6489641 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6489596 and 6489605.

It is not an unprimeable number, because it can be changed into a prime (6489641) 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, 8680 + ... + 9397.

It is an arithmetic number, because the mean of its divisors is an integer number (1627020).

Almost surely, 2^6489643 is an apocalyptic number.

6489643 is a deficient number, since it is larger than the sum of its proper divisors (18437).

6489643 is a wasteful number, since it uses less digits than its factorization.

6489643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436.

The product of its digits is 124416, while the sum is 40.

The square root of 6489643 is about 2547.4777722288. The cubic root of 6489643 is about 186.5263830501.

The spelling of 6489643 in words is "six million, four hundred eighty-nine thousand, six hundred forty-three".