822494871 has 16 divisors (see below), whose sum is σ = 1329285120. Its totient is φ = 498481560.

The previous prime is 822494801. The next prime is 822494879. The reversal of 822494871 is 178494228.

822494871 is a `hidden beast` number, since 82 + 2 + 494 + 87 + 1 = 666.

It is not a de Polignac number, because 822494871 - 2¹⁵ = 822462103 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822494879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384375 + ... + 1384968.

It is an arithmetic number, because the mean of its divisors is an integer number (83080320).

Almost surely, 2^822494871 is an apocalyptic number.

822494871 is a deficient number, since it is larger than the sum of its proper divisors (506790249).

822494871 is a wasteful number, since it uses less digits than its factorization.

822494871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769363 (or 2769357 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 822494871 is about 28679.1713792432. The cubic root of 822494871 is about 936.9384592373.

The spelling of 822494871 in words is "eight hundred twenty-two million, four hundred ninety-four thousand, eight hundred seventy-one".