6220447 has 2 divisors, whose sum is σ = 6220448. Its totient is φ = 6220446.

The previous prime is 6220433. The next prime is 6220457. The reversal of 6220447 is 7440226.

6220447 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 a de Polignac number, because none of the positive numbers 2^k-6220447 is a prime.

6220447 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6220457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110223 + 3110224.

It is an arithmetic number, because the mean of its divisors is an integer number (3110224).

Almost surely, 2^6220447 is an apocalyptic number.

6220447 is a deficient number, since it is larger than the sum of its proper divisors (1).

6220447 is an equidigital number, since it uses as much as digits as its factorization.

6220447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 6220447 is about 2494.0823963935. The cubic root of 6220447 is about 183.9107849634.

The spelling of 6220447 in words is "six million, two hundred twenty thousand, four hundred forty-seven".