2644847 has 2 divisors, whose sum is σ = 2644848. Its totient is φ = 2644846.

The previous prime is 2644823. The next prime is 2644849. The reversal of 2644847 is 7484462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2644847 is a prime.

Together with 2644849, 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 (2644849) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322423 + 1322424.

It is an arithmetic number, because the mean of its divisors is an integer number (1322424).

2^2644847 is an apocalyptic number.

2644847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2644847 is an equidigital number, since it uses as much as digits as its factorization.

2644847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 35.

The square root of 2644847 is about 1626.2985580760. The cubic root of 2644847 is about 138.2929957710.

The spelling of 2644847 in words is "two million, six hundred forty-four thousand, eight hundred forty-seven".