822389 has 2 divisors, whose sum is σ = 822390. Its totient is φ = 822388.

The previous prime is 822383. The next prime is 822391. The reversal of 822389 is 983228.

It is a happy number.

822389 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 can be written as a sum of positive squares in only one way, i.e., 819025 + 3364 = 905^2 + 58^2 .

It is a cyclic number.

It is not a de Polignac number, because 822389 - 2¹⁶ = 756853 is a prime.

It is a super-3 number, since 3×822389³ = 1668603433333349607, which contains 333 as substring.

Together with 822391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411194 + 411195.

It is an arithmetic number, because the mean of its divisors is an integer number (411195).

2⁸²²³⁸⁹ is an apocalyptic number.

It is an amenable number.

822389 is a deficient number, since it is larger than the sum of its proper divisors (1).

822389 is an equidigital number, since it uses as much as digits as its factorization.

822389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 822389 is about 906.8566590151. The cubic root of 822389 is about 93.6898256811.

The spelling of 822389 in words is "eight hundred twenty-two thousand, three hundred eighty-nine".