6720443 has 2 divisors, whose sum is σ = 6720444. Its totient is φ = 6720442.

The previous prime is 6720437. The next prime is 6720473. The reversal of 6720443 is 3440276.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6720443 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (6720403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360221 + 3360222.

It is an arithmetic number, because the mean of its divisors is an integer number (3360222).

Almost surely, 2^6720443 is an apocalyptic number.

6720443 is a deficient number, since it is larger than the sum of its proper divisors (1).

6720443 is an equidigital number, since it uses as much as digits as its factorization.

6720443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 6720443 is about 2592.3817234350. The cubic root of 6720443 is about 188.7119058248.

The spelling of 6720443 in words is "six million, seven hundred twenty thousand, four hundred forty-three".