2196820897 has 2 divisors, whose sum is σ = 2196820898. Its totient is φ = 2196820896.

The previous prime is 2196820891. The next prime is 2196820949. The reversal of 2196820897 is 7980286912.

It is an a-pointer prime, because the next prime (2196820949) can be obtained adding 2196820897 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1963464721 + 233356176 = 44311^2 + 15276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2196820897 - 2³ = 2196820889 is a prime.

It is not a weakly prime, because it can be changed into another prime (2196820891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098410448 + 1098410449.

It is an arithmetic number, because the mean of its divisors is an integer number (1098410449).

Almost surely, 2^2196820897 is an apocalyptic number.

It is an amenable number.

2196820897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2196820897 is an equidigital number, since it uses as much as digits as its factorization.

2196820897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 2196820897 is about 46870.2559946071. The cubic root of 2196820897 is about 1299.9646730045.

The spelling of 2196820897 in words is "two billion, one hundred ninety-six million, eight hundred twenty thousand, eight hundred ninety-seven".