6543013 has 4 divisors (see below), whose sum is σ = 6616620. Its totient is φ = 6469408.

The previous prime is 6543007. The next prime is 6543029. The reversal of 6543013 is 3103456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3928324 + 2614689 = 1982^2 + 1617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6543013 is a prime.

It is a super-2 number, since 2×6543013² = 85622038236338, which contains 22 as substring.

It is a Duffinian number.

6543013 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543073) by changing a digit.

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, 36670 + ... + 36847.

It is an arithmetic number, because the mean of its divisors is an integer number (1654155).

Almost surely, 2^6543013 is an apocalyptic number.

It is an amenable number.

6543013 is a deficient number, since it is larger than the sum of its proper divisors (73607).

6543013 is an equidigital number, since it uses as much as digits as its factorization.

6543013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73606.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 6543013 is about 2557.9313907922. The cubic root of 6543013 is about 187.0363108304.

Adding to 6543013 its reverse (3103456), we get a palindrome (9646469).

The spelling of 6543013 in words is "six million, five hundred forty-three thousand, thirteen".