822987 has 32 divisors (see below), whose sum is σ = 1416960. Its totient is φ = 466560.

The previous prime is 822973. The next prime is 822989. The reversal of 822987 is 789228.

It is not a de Polignac number, because 822987 - 2⁴ = 822971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (822989) 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 31 ways as a sum of consecutive naturals, for example, 4968 + ... + 5130.

It is an arithmetic number, because the mean of its divisors is an integer number (44280).

2⁸²²⁹⁸⁷ is an apocalyptic number.

822987 is a deficient number, since it is larger than the sum of its proper divisors (593973).

822987 is a wasteful number, since it uses less digits than its factorization.

822987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 194 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 822987 is about 907.1863094205. The cubic root of 822987 is about 93.7125290252.

The spelling of 822987 in words is "eight hundred twenty-two thousand, nine hundred eighty-seven".