6721793 has 4 divisors (see below), whose sum is σ = 7238868. Its totient is φ = 6204720.

The previous prime is 6721789. The next prime is 6721843. The reversal of 6721793 is 3971276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4566769 + 2155024 = 2137^2 + 1468^2 .

It is a cyclic number.

It is not a de Polignac number, because 6721793 - 2² = 6721789 is a prime.

It is a super-2 number, since 2×6721793² = 90365002269698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6721723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258518 + ... + 258543.

It is an arithmetic number, because the mean of its divisors is an integer number (1809717).

Almost surely, 2^6721793 is an apocalyptic number.

It is an amenable number.

6721793 is a deficient number, since it is larger than the sum of its proper divisors (517075).

6721793 is a wasteful number, since it uses less digits than its factorization.

6721793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517074.

The product of its digits is 15876, while the sum is 35.

The square root of 6721793 is about 2592.6420886810. The cubic root of 6721793 is about 188.7245411037.

The spelling of 6721793 in words is "six million, seven hundred twenty-one thousand, seven hundred ninety-three".