2170897 has 2 divisors, whose sum is σ = 2170898. Its totient is φ = 2170896.

The previous prime is 2170877. The next prime is 2170907. The reversal of 2170897 is 7980712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2163841 + 7056 = 1471^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 2170897 - 2¹⁹ = 1646609 is a prime.

It is not a weakly prime, because it can be changed into another prime (2170877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085448 + 1085449.

It is an arithmetic number, because the mean of its divisors is an integer number (1085449).

2^2170897 is an apocalyptic number.

It is an amenable number.

2170897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170897 is an equidigital number, since it uses as much as digits as its factorization.

2170897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2170897 is about 1473.3964164474. The cubic root of 2170897 is about 129.4830953421.

Subtracting from 2170897 its product of nonzero digits (7056), we obtain a square (2163841 = 1471²).

The spelling of 2170897 in words is "two million, one hundred seventy thousand, eight hundred ninety-seven".