822170997 has 12 divisors (see below), whose sum is σ = 1188137184. Its totient is φ = 547857000.

The previous prime is 822170989. The next prime is 822171019. The reversal of 822170997 is 799071228.

It is not a de Polignac number, because 822170997 - 2³ = 822170989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822178997) 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 11 ways as a sum of consecutive naturals, for example, 33 + ... + 40550.

It is an arithmetic number, because the mean of its divisors is an integer number (99011432).

Almost surely, 2^822170997 is an apocalyptic number.

It is an amenable number.

822170997 is a deficient number, since it is larger than the sum of its proper divisors (365966187).

822170997 is a wasteful number, since it uses less digits than its factorization.

822170997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42840 (or 42837 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 822170997 is about 28673.5243212271. The cubic root of 822170997 is about 936.8154635989.

The spelling of 822170997 in words is "eight hundred twenty-two million, one hundred seventy thousand, nine hundred ninety-seven".