897191 has 2 divisors, whose sum is σ = 897192. Its totient is φ = 897190.

The previous prime is 897163. The next prime is 897223. The reversal of 897191 is 191798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 897191 - 2¹⁰ = 896167 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448595 + 448596.

It is an arithmetic number, because the mean of its divisors is an integer number (448596).

2⁸⁹⁷¹⁹¹ is an apocalyptic number.

897191 is a deficient number, since it is larger than the sum of its proper divisors (1).

897191 is an equidigital number, since it uses as much as digits as its factorization.

897191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 35.

The square root of 897191 is about 947.2016680729. The cubic root of 897191 is about 96.4483871224.

The spelling of 897191 in words is "eight hundred ninety-seven thousand, one hundred ninety-one".