6921793 has 2 divisors, whose sum is σ = 6921794. Its totient is φ = 6921792.

The previous prime is 6921791. The next prime is 6921847. The reversal of 6921793 is 3971296.

6921793 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5303809 + 1617984 = 2303^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 6921793 - 2¹ = 6921791 is a prime.

It is a super-2 number, since 2×6921793² = 95822436669698, which contains 22 as substring.

Together with 6921791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6921791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3460896 + 3460897.

It is an arithmetic number, because the mean of its divisors is an integer number (3460897).

Almost surely, 2^6921793 is an apocalyptic number.

It is an amenable number.

6921793 is a deficient number, since it is larger than the sum of its proper divisors (1).

6921793 is an equidigital number, since it uses as much as digits as its factorization.

6921793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 6921793 is about 2630.9300636847. The cubic root of 6921793 is about 190.5780456959.

It can be divided in two parts, 692 and 1793, that added together give a triangular number (2485 = T₇₀).

The spelling of 6921793 in words is "six million, nine hundred twenty-one thousand, seven hundred ninety-three".