897541681 has 3 divisors (see below), whose sum is σ = 897571641. Its totient is φ = 897511722.

The previous prime is 897541649. The next prime is 897541699. The reversal of 897541681 is 186145798.

The square root of 897541681 is 29959.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 897541681 - 2⁵ = 897541649 is a prime.

It is a super-2 number, since 2×897541681² = 1611162138264611522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897541781) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14980 + ... + 44938.

It is an arithmetic number, because the mean of its divisors is an integer number (299190547).

Almost surely, 2^897541681 is an apocalyptic number.

897541681 is the 29959-th square number.

897541681 is the 14980-th centered octagonal number.

It is an amenable number.

897541681 is a deficient number, since it is larger than the sum of its proper divisors (29960).

897541681 is an frugal number, since it uses more digits than its factorization.

897541681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59918 (or 29959 counting only the distinct ones).

The product of its digits is 483840, while the sum is 49.

The cubic root of 897541681 is about 964.6095160090.

Multiplying 897541681 by its sum of digits (49), we get a square (43979542369 = 209713²).

The spelling of 897541681 in words is "eight hundred ninety-seven million, five hundred forty-one thousand, six hundred eighty-one".