897705 has 12 divisors (see below), whose sum is σ = 1556100. Its totient is φ = 478752.

The previous prime is 897703. The next prime is 897707. The reversal of 897705 is 507798.

It is an interprime number because it is at equal distance from previous prime (897703) and next prime (897707).

It can be written as a sum of positive squares in 2 ways, for example, as 197136 + 700569 = 444^2 + 837^2 .

It is not a de Polignac number, because 897705 - 2¹ = 897703 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 897705.

It is not an unprimeable number, because it can be changed into a prime (897703) 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 in 11 ways as a sum of consecutive naturals, for example, 9930 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (129675).

2⁸⁹⁷⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

897705 is a deficient number, since it is larger than the sum of its proper divisors (658395).

897705 is a wasteful number, since it uses less digits than its factorization.

897705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19960 (or 19957 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 897705 is about 947.4729547591. The cubic root of 897705 is about 96.4668020073.

The spelling of 897705 in words is "eight hundred ninety-seven thousand, seven hundred five".