6543743 has 4 divisors (see below), whose sum is σ = 6574968. Its totient is φ = 6512520.

The previous prime is 6543739. The next prime is 6543767. The reversal of 6543743 is 3473456.

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 6543743 - 2² = 6543739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543773) 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, 15296 + ... + 15717.

It is an arithmetic number, because the mean of its divisors is an integer number (1643742).

Almost surely, 2^6543743 is an apocalyptic number.

6543743 is a deficient number, since it is larger than the sum of its proper divisors (31225).

6543743 is a wasteful number, since it uses less digits than its factorization.

6543743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31224.

The product of its digits is 30240, while the sum is 32.

The square root of 6543743 is about 2558.0740802408. The cubic root of 6543743 is about 187.0432664144.

The spelling of 6543743 in words is "six million, five hundred forty-three thousand, seven hundred forty-three".