6543964 has 12 divisors (see below), whose sum is σ = 13087984. Its totient is φ = 2804544.

The previous prime is 6543947. The next prime is 6543973. The reversal of 6543964 is 4693456.

It is a happy number.

6543964 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116829 + ... + 116884.

Almost surely, 2^6543964 is an apocalyptic number.

It is an amenable number.

6543964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6543964 is a wasteful number, since it uses less digits than its factorization.

6543964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233724 (or 233722 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 6543964 is about 2558.1172764359. The cubic root of 6543964 is about 187.0453720440.

The spelling of 6543964 in words is "six million, five hundred forty-three thousand, nine hundred sixty-four".