822397 has 4 divisors (see below), whose sum is σ = 824320. Its totient is φ = 820476.

The previous prime is 822391. The next prime is 822407. The reversal of 822397 is 793228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 822397 - 2³ = 822389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4 + ... + 1282.

It is an arithmetic number, because the mean of its divisors is an integer number (206080).

2⁸²²³⁹⁷ is an apocalyptic number.

It is an amenable number.

822397 is a deficient number, since it is larger than the sum of its proper divisors (1923).

822397 is a wasteful number, since it uses less digits than its factorization.

822397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922.

The product of its digits is 6048, while the sum is 31.

The square root of 822397 is about 906.8610698448. The cubic root of 822397 is about 93.6901294774.

The spelling of 822397 in words is "eight hundred twenty-two thousand, three hundred ninety-seven".