6498643 has 12 divisors (see below), whose sum is σ = 6888672. Its totient is φ = 6127200.

The previous prime is 6498629. The next prime is 6498659. The reversal of 6498643 is 3468946.

It is a de Polignac number, because none of the positive numbers 2^k-6498643 is a prime.

It is an Ulam number.

It is a Duffinian number.

6498643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6498596 and 6498605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6498683) 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 11 ways as a sum of consecutive naturals, for example, 64293 + ... + 64393.

It is an arithmetic number, because the mean of its divisors is an integer number (574056).

Almost surely, 2^6498643 is an apocalyptic number.

6498643 is a deficient number, since it is larger than the sum of its proper divisors (390029).

6498643 is a wasteful number, since it uses less digits than its factorization.

6498643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 185 counting only the distinct ones).

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

The square root of 6498643 is about 2549.2436133096. The cubic root of 6498643 is about 186.6125697123.

The spelling of 6498643 in words is "six million, four hundred ninety-eight thousand, six hundred forty-three".