822849 has 4 divisors (see below), whose sum is σ = 1097136. Its totient is φ = 548564.

The previous prime is 822839. The next prime is 822853. The reversal of 822849 is 948228.

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 822849 - 2⁷ = 822721 is a prime.

It is a D-number.

822849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (822839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137139 + ... + 137144.

It is an arithmetic number, because the mean of its divisors is an integer number (274284).

2⁸²²⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

822849 is a deficient number, since it is larger than the sum of its proper divisors (274287).

822849 is a wasteful number, since it uses less digits than its factorization.

822849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274286.

The product of its digits is 9216, while the sum is 33.

The square root of 822849 is about 907.1102468829. The cubic root of 822849 is about 93.7072907683.

The spelling of 822849 in words is "eight hundred twenty-two thousand, eight hundred forty-nine".