822857897 has 2 divisors, whose sum is σ = 822857898. Its totient is φ = 822857896.

The previous prime is 822857879. The next prime is 822857941. The reversal of 822857897 is 798758228.

It is a happy number.

Together with previous prime (822857879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532871056 + 289986841 = 23084^2 + 17029^2 .

It is a cyclic number.

It is not a de Polignac number, because 822857897 - 2¹⁰ = 822856873 is a prime.

It is not a weakly prime, because it can be changed into another prime (822857857) 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 as a sum of consecutive naturals, namely, 411428948 + 411428949.

It is an arithmetic number, because the mean of its divisors is an integer number (411428949).

Almost surely, 2^822857897 is an apocalyptic number.

It is an amenable number.

822857897 is a deficient number, since it is larger than the sum of its proper divisors (1).

822857897 is an equidigital number, since it uses as much as digits as its factorization.

822857897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4515840, while the sum is 56.

The square root of 822857897 is about 28685.4997690471. The cubic root of 822857897 is about 937.0762850174.

The spelling of 822857897 in words is "eight hundred twenty-two million, eight hundred fifty-seven thousand, eight hundred ninety-seven".