6406847 has 2 divisors, whose sum is σ = 6406848. Its totient is φ = 6406846.

The previous prime is 6406831. The next prime is 6406849. The reversal of 6406847 is 7486046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6406847 - 2⁴ = 6406831 is a prime.

Together with 6406849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6406849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203423 + 3203424.

It is an arithmetic number, because the mean of its divisors is an integer number (3203424).

Almost surely, 2^6406847 is an apocalyptic number.

6406847 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406847 is an equidigital number, since it uses as much as digits as its factorization.

6406847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 6406847 is about 2531.1750235809. The cubic root of 6406847 is about 185.7297400777.

The spelling of 6406847 in words is "six million, four hundred six thousand, eight hundred forty-seven".