6321643 has 2 divisors, whose sum is σ = 6321644. Its totient is φ = 6321642.

The previous prime is 6321611. The next prime is 6321647. The reversal of 6321643 is 3461236.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6321643 - 2⁵ = 6321611 is a prime.

6321643 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6321647) 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 as a sum of consecutive naturals, namely, 3160821 + 3160822.

It is an arithmetic number, because the mean of its divisors is an integer number (3160822).

Almost surely, 2^6321643 is an apocalyptic number.

6321643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6321643 is an equidigital number, since it uses as much as digits as its factorization.

6321643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 6321643 is about 2514.2877719147. The cubic root of 6321643 is about 184.9027294839.

Adding to 6321643 its reverse (3461236), we get a palindrome (9782879).

The spelling of 6321643 in words is "six million, three hundred twenty-one thousand, six hundred forty-three".