6933721 has 2 divisors, whose sum is σ = 6933722. Its totient is φ = 6933720.

The previous prime is 6933713. The next prime is 6933749. The reversal of 6933721 is 1273396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3822025 + 3111696 = 1955^2 + 1764^2 .

It is a cyclic number.

It is not a de Polignac number, because 6933721 - 2³ = 6933713 is a prime.

It is not a weakly prime, because it can be changed into another prime (6933701) 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, 3466860 + 3466861.

It is an arithmetic number, because the mean of its divisors is an integer number (3466861).

Almost surely, 2^6933721 is an apocalyptic number.

It is an amenable number.

6933721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6933721 is an equidigital number, since it uses as much as digits as its factorization.

6933721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 31.

The square root of 6933721 is about 2633.1959668813. The cubic root of 6933721 is about 190.6874542650.

The spelling of 6933721 in words is "six million, nine hundred thirty-three thousand, seven hundred twenty-one".