6543969 has 16 divisors (see below), whose sum is σ = 9059904. Its totient is φ = 4198400.

The previous prime is 6543947. The next prime is 6543973. The reversal of 6543969 is 9693456.

6543969 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6543969 - 2⁹ = 6543457 is a prime.

It is a super-2 number, since 2×6543969² = 85647060545922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6543969.

It is not an unprimeable number, because it can be changed into a prime (6543989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9889 + ... + 10529.

It is an arithmetic number, because the mean of its divisors is an integer number (566244).

Almost surely, 2^6543969 is an apocalyptic number.

It is an amenable number.

6543969 is a deficient number, since it is larger than the sum of its proper divisors (2515935).

6543969 is a wasteful number, since it uses less digits than its factorization.

6543969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768.

The product of its digits is 174960, while the sum is 42.

The square root of 6543969 is about 2558.1182537170. The cubic root of 6543969 is about 187.0454196821.

The spelling of 6543969 in words is "six million, five hundred forty-three thousand, nine hundred sixty-nine".