822487 has 4 divisors (see below), whose sum is σ = 825696. Its totient is φ = 819280.

The previous prime is 822433. The next prime is 822517. The reversal of 822487 is 784228.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-822487 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822407) 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, 1183 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (206424).

2⁸²²⁴⁸⁷ is an apocalyptic number.

822487 is a deficient number, since it is larger than the sum of its proper divisors (3209).

822487 is a wasteful number, since it uses less digits than its factorization.

822487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208.

The product of its digits is 7168, while the sum is 31.

The square root of 822487 is about 906.9106902005. The cubic root of 822487 is about 93.6935470499.

The spelling of 822487 in words is "eight hundred twenty-two thousand, four hundred eighty-seven".