19822897 has 2 divisors, whose sum is σ = 19822898. Its totient is φ = 19822896.

The previous prime is 19822889. The next prime is 19822949. The reversal of 19822897 is 79822891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10342656 + 9480241 = 3216^2 + 3079^2 .

It is an emirp because it is prime and its reverse (79822891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19822897 - 2³ = 19822889 is a prime.

It is not a weakly prime, because it can be changed into another prime (19822877) 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, 9911448 + 9911449.

It is an arithmetic number, because the mean of its divisors is an integer number (9911449).

Almost surely, 2^19822897 is an apocalyptic number.

It is an amenable number.

19822897 is a deficient number, since it is larger than the sum of its proper divisors (1).

19822897 is an equidigital number, since it uses as much as digits as its factorization.

19822897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 19822897 is about 4452.2912079063. The cubic root of 19822897 is about 270.6381658119.

The spelling of 19822897 in words is "nineteen million, eight hundred twenty-two thousand, eight hundred ninety-seven".