6784321 has 2 divisors, whose sum is σ = 6784322. Its totient is φ = 6784320.

The previous prime is 6784313. The next prime is 6784361. The reversal of 6784321 is 1234876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5574321 + 1210000 = 2361^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 6784321 - 2³ = 6784313 is a prime.

It is a super-2 number, since 2×6784321² = 92054022862082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6784361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3392160 + 3392161.

It is an arithmetic number, because the mean of its divisors is an integer number (3392161).

Almost surely, 2^6784321 is an apocalyptic number.

It is an amenable number.

6784321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6784321 is an equidigital number, since it uses as much as digits as its factorization.

6784321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 6784321 is about 2604.6729161259. The cubic root of 6784321 is about 189.3079253937.

The spelling of 6784321 in words is "six million, seven hundred eighty-four thousand, three hundred twenty-one".