6721293 has 4 divisors (see below), whose sum is σ = 8961728. Its totient is φ = 4480860.

The previous prime is 6721289. The next prime is 6721303. The reversal of 6721293 is 3921276.

6721293 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6721293 - 2² = 6721289 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6721293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721213) 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, 1120213 + ... + 1120218.

It is an arithmetic number, because the mean of its divisors is an integer number (2240432).

Almost surely, 2^6721293 is an apocalyptic number.

It is an amenable number.

6721293 is a deficient number, since it is larger than the sum of its proper divisors (2240435).

6721293 is a wasteful number, since it uses less digits than its factorization.

6721293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240434.

The product of its digits is 4536, while the sum is 30.

The square root of 6721293 is about 2592.5456601572. The cubic root of 6721293 is about 188.7198615681.

The spelling of 6721293 in words is "six million, seven hundred twenty-one thousand, two hundred ninety-three".