897765 has 16 divisors (see below), whose sum is σ = 1567296. Its totient is φ = 435200.

The previous prime is 897751. The next prime is 897779. The reversal of 897765 is 567798.

It is an interprime number because it is at equal distance from previous prime (897751) and next prime (897779).

It is a de Polignac number, because none of the positive numbers 2^k-897765 is a prime.

It is a Curzon number.

897765 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 897765.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2556 + ... + 2885.

It is an arithmetic number, because the mean of its divisors is an integer number (97956).

2⁸⁹⁷⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

897765 is a deficient number, since it is larger than the sum of its proper divisors (669531).

897765 is a wasteful number, since it uses less digits than its factorization.

897765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460.

The product of its digits is 105840, while the sum is 42.

The square root of 897765 is about 947.5046174030. The cubic root of 897765 is about 96.4689511465.

The spelling of 897765 in words is "eight hundred ninety-seven thousand, seven hundred sixty-five".