844835489 has 2 divisors, whose sum is σ = 844835490. Its totient is φ = 844835488.

The previous prime is 844835479. The next prime is 844835521. The reversal of 844835489 is 984538448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431933089 + 412902400 = 20783^2 + 20320^2 .

It is a cyclic number.

It is not a de Polignac number, because 844835489 - 2⁴ = 844835473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 844835489.

It is not a weakly prime, because it can be changed into another prime (844835479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422417744 + 422417745.

It is an arithmetic number, because the mean of its divisors is an integer number (422417745).

Almost surely, 2^844835489 is an apocalyptic number.

It is an amenable number.

844835489 is a deficient number, since it is larger than the sum of its proper divisors (1).

844835489 is an equidigital number, since it uses as much as digits as its factorization.

844835489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4423680, while the sum is 53.

The square root of 844835489 is about 29066.0538945348. The cubic root of 844835489 is about 945.3458376053.

The spelling of 844835489 in words is "eight hundred forty-four million, eight hundred thirty-five thousand, four hundred eighty-nine".