6721733 has 2 divisors, whose sum is σ = 6721734. Its totient is φ = 6721732.

The previous prime is 6721723. The next prime is 6721739. The reversal of 6721733 is 3371276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5841889 + 879844 = 2417^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 6721733 - 2⁶ = 6721669 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6721696 and 6721705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6721739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360866 + 3360867.

It is an arithmetic number, because the mean of its divisors is an integer number (3360867).

Almost surely, 2^6721733 is an apocalyptic number.

It is an amenable number.

6721733 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721733 is an equidigital number, since it uses as much as digits as its factorization.

6721733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 29.

The square root of 6721733 is about 2592.6305174475. The cubic root of 6721733 is about 188.7239795717.

The spelling of 6721733 in words is "six million, seven hundred twenty-one thousand, seven hundred thirty-three".