6723643 has 2 divisors, whose sum is σ = 6723644. Its totient is φ = 6723642.

The previous prime is 6723641. The next prime is 6723667. The reversal of 6723643 is 3463276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6723643 - 2¹ = 6723641 is a prime.

Together with 6723641, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 6 + 7⁸ + 2¹⁷ + 3 + 6⁷ + 4⁷ + 3¹² .

It is not a weakly prime, because it can be changed into another prime (6723641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3361821 + 3361822.

It is an arithmetic number, because the mean of its divisors is an integer number (3361822).

Almost surely, 2^6723643 is an apocalyptic number.

6723643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6723643 is an equidigital number, since it uses as much as digits as its factorization.

6723643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 31.

The square root of 6723643 is about 2592.9988430387. The cubic root of 6723643 is about 188.7418533683.

The spelling of 6723643 in words is "six million, seven hundred twenty-three thousand, six hundred forty-three".