897664 has 16 divisors (see below), whose sum is σ = 1788570. Its totient is φ = 448768.

The previous prime is 897649. The next prime is 897671. The reversal of 897664 is 466798.

It can be written as a sum of positive squares in only one way, i.e., 627264 + 270400 = 792^2 + 520^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a d-powerful number, because it can be written as 8³ + 9² + 6³ + 7⁷ + 6⁵ + 4⁸ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3379 + ... + 3634.

2⁸⁹⁷⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

897664 is a deficient number, since it is larger than the sum of its proper divisors (890906).

897664 is an equidigital number, since it uses as much as digits as its factorization.

897664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027 (or 7015 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 897664 is about 947.4513180106. The cubic root of 897664 is about 96.4653333737.

The spelling of 897664 in words is "eight hundred ninety-seven thousand, six hundred sixty-four".