822217489 has 2 divisors, whose sum is σ = 822217490. Its totient is φ = 822217488.

The previous prime is 822217481. The next prime is 822217519. The reversal of 822217489 is 984712228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423536400 + 398681089 = 20580^2 + 19967^2 .

It is a cyclic number.

It is not a de Polignac number, because 822217489 - 2³ = 822217481 is a prime.

It is not a weakly prime, because it can be changed into another prime (822217481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411108744 + 411108745.

It is an arithmetic number, because the mean of its divisors is an integer number (411108745).

Almost surely, 2^822217489 is an apocalyptic number.

It is an amenable number.

822217489 is a deficient number, since it is larger than the sum of its proper divisors (1).

822217489 is an equidigital number, since it uses as much as digits as its factorization.

822217489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 822217489 is about 28674.3350228039. The cubic root of 822217489 is about 936.8331215653.

The spelling of 822217489 in words is "eight hundred twenty-two million, two hundred seventeen thousand, four hundred eighty-nine".