844489 has 2 divisors, whose sum is σ = 844490. Its totient is φ = 844488.

The previous prime is 844483. The next prime is 844499. The reversal of 844489 is 984448.

844489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840889 + 3600 = 917^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 844489 - 2⁵ = 844457 is a prime.

It is a super-2 number, since 2×844489² = 1426323342242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (844483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422244 + 422245.

It is an arithmetic number, because the mean of its divisors is an integer number (422245).

2⁸⁴⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

844489 is a deficient number, since it is larger than the sum of its proper divisors (1).

844489 is an equidigital number, since it uses as much as digits as its factorization.

844489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 37.

The square root of 844489 is about 918.9608261509. The cubic root of 844489 is about 94.5216582964.

The spelling of 844489 in words is "eight hundred forty-four thousand, four hundred eighty-nine".