6781223 has 2 divisors, whose sum is σ = 6781224. Its totient is φ = 6781222.

The previous prime is 6781193. The next prime is 6781231. The reversal of 6781223 is 3221876.

It is a happy number.

6781223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6781223 - 2²⁰ = 5732647 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6781253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390611 + 3390612.

It is an arithmetic number, because the mean of its divisors is an integer number (3390612).

Almost surely, 2^6781223 is an apocalyptic number.

6781223 is a deficient number, since it is larger than the sum of its proper divisors (1).

6781223 is an equidigital number, since it uses as much as digits as its factorization.

6781223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 6781223 is about 2604.0781478289. The cubic root of 6781223 is about 189.2791057450.

The spelling of 6781223 in words is "six million, seven hundred eighty-one thousand, two hundred twenty-three".