844609 has 2 divisors, whose sum is σ = 844610. Its totient is φ = 844608.

The previous prime is 844603. The next prime is 844619. The reversal of 844609 is 906448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804609 + 40000 = 897^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 844609 - 2³ = 844601 is a prime.

It is not a weakly prime, because it can be changed into another prime (844601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422304 + 422305.

It is an arithmetic number, because the mean of its divisors is an integer number (422305).

2⁸⁴⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

844609 is a deficient number, since it is larger than the sum of its proper divisors (1).

844609 is an equidigital number, since it uses as much as digits as its factorization.

844609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 844609 is about 919.0261149717. The cubic root of 844609 is about 94.5261351899.

The spelling of 844609 in words is "eight hundred forty-four thousand, six hundred nine".