897217 has 4 divisors (see below), whose sum is σ = 902356. Its totient is φ = 892080.

The previous prime is 897191. The next prime is 897223. The reversal of 897217 is 712798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712798 = 2 ⋅356399.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 579121 = 564^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 897217 - 2¹⁵ = 864449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897317) 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, 2298 + ... + 2659.

It is an arithmetic number, because the mean of its divisors is an integer number (225589).

2⁸⁹⁷²¹⁷ is an apocalyptic number.

It is an amenable number.

897217 is a deficient number, since it is larger than the sum of its proper divisors (5139).

897217 is a wasteful number, since it uses less digits than its factorization.

897217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138.

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

The square root of 897217 is about 947.2153926114. The cubic root of 897217 is about 96.4493187835.

The spelling of 897217 in words is "eight hundred ninety-seven thousand, two hundred seventeen".