897905 has 4 divisors (see below), whose sum is σ = 1077492. Its totient is φ = 718320.

The previous prime is 897899. The next prime is 897907. The reversal of 897905 is 509798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509798 = 2 ⋅254899.

It can be written as a sum of positive squares in 2 ways, for example, as 107584 + 790321 = 328^2 + 889^2 .

It is not a de Polignac number, because 897905 - 2⁸ = 897649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (897907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89786 + ... + 89795.

It is an arithmetic number, because the mean of its divisors is an integer number (269373).

2⁸⁹⁷⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

897905 is a deficient number, since it is larger than the sum of its proper divisors (179587).

897905 is a wasteful number, since it uses less digits than its factorization.

897905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179586.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 897905 is about 947.5784927910. The cubic root of 897905 is about 96.4739654324.

The spelling of 897905 in words is "eight hundred ninety-seven thousand, nine hundred five".