6721713 has 12 divisors (see below), whose sum is σ = 9746100. Its totient is φ = 4464096.

The previous prime is 6721711. The next prime is 6721723. The reversal of 6721713 is 3171276.

It can be written as a sum of positive squares in 2 ways, for example, as 6290064 + 431649 = 2508^2 + 657^2 .

It is not a de Polignac number, because 6721713 - 2¹ = 6721711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6721711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1363 + ... + 3911.

It is an arithmetic number, because the mean of its divisors is an integer number (812175).

Almost surely, 2^6721713 is an apocalyptic number.

It is an amenable number.

6721713 is a deficient number, since it is larger than the sum of its proper divisors (3024387).

6721713 is a wasteful number, since it uses less digits than its factorization.

6721713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848 (or 2845 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 6721713 is about 2592.6266603582. The cubic root of 6721713 is about 188.7237923936.

Adding to 6721713 its reverse (3171276), we get a palindrome (9892989).

The spelling of 6721713 in words is "six million, seven hundred twenty-one thousand, seven hundred thirteen".