897321285 has 192 divisors, whose sum is σ = 1988872704. Its totient is φ = 364953600.

The previous prime is 897321283. The next prime is 897321349. The reversal of 897321285 is 582123798.

It is a happy number.

It is not a de Polignac number, because 897321285 - 2¹ = 897321283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 897321285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897321283) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13392822 + ... + 13392888.

It is an arithmetic number, because the mean of its divisors is an integer number (10358712).

Almost surely, 2^897321285 is an apocalyptic number.

897321285 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

897321285 is an abundant number, since it is smaller than the sum of its proper divisors (1091551419).

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

897321285 is a wasteful number, since it uses less digits than its factorization.

897321285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 201 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 897321285 is about 29955.3214804983. The cubic root of 897321285 is about 964.5305545943.

The spelling of 897321285 in words is "eight hundred ninety-seven million, three hundred twenty-one thousand, two hundred eighty-five".