844427 has 2 divisors, whose sum is σ = 844428. Its totient is φ = 844426.

The previous prime is 844421. The next prime is 844429. The reversal of 844427 is 724448.

844427 is digitally balanced in base 2, 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 844427 - 2¹² = 840331 is a prime.

Together with 844429, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 844427.

It is not a weakly prime, because it can be changed into another prime (844421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422213 + 422214.

It is an arithmetic number, because the mean of its divisors is an integer number (422214).

2⁸⁴⁴⁴²⁷ is an apocalyptic number.

844427 is a deficient number, since it is larger than the sum of its proper divisors (1).

844427 is an equidigital number, since it uses as much as digits as its factorization.

844427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 29.

The square root of 844427 is about 918.9270917761. The cubic root of 844427 is about 94.5193450687.

The spelling of 844427 in words is "eight hundred forty-four thousand, four hundred twenty-seven".