822493 has 4 divisors (see below), whose sum is σ = 940000. Its totient is φ = 704988.

The previous prime is 822433. The next prime is 822517. The reversal of 822493 is 394228.

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 a de Polignac number, because none of the positive numbers 2^k-822493 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 (822433) 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, 58743 + ... + 58756.

It is an arithmetic number, because the mean of its divisors is an integer number (235000).

2⁸²²⁴⁹³ is an apocalyptic number.

It is an amenable number.

822493 is a deficient number, since it is larger than the sum of its proper divisors (117507).

822493 is a wasteful number, since it uses less digits than its factorization.

822493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117506.

The product of its digits is 3456, while the sum is 28.

The square root of 822493 is about 906.9139981277. The cubic root of 822493 is about 93.6937748792.

The spelling of 822493 in words is "eight hundred twenty-two thousand, four hundred ninety-three".