897918 has 16 divisors (see below), whose sum is σ = 2052480. Its totient is φ = 256536.

The previous prime is 897907. The next prime is 897931. The reversal of 897918 is 819798.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 21379 = 897918 / (8 + 9 + 7 + 9 + 1 + 8).

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 897918.

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 897918.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10648 + ... + 10731.

It is an arithmetic number, because the mean of its divisors is an integer number (128280).

2⁸⁹⁷⁹¹⁸ is an apocalyptic number.

897918 is an abundant number, since it is smaller than the sum of its proper divisors (1154562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

897918 is a wasteful number, since it uses less digits than its factorization.

897918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21391.

The product of its digits is 36288, while the sum is 42.

The square root of 897918 is about 947.5853523562. The cubic root of 897918 is about 96.4744310183.

The spelling of 897918 in words is "eight hundred ninety-seven thousand, nine hundred eighteen".