897681121 has 4 divisors (see below), whose sum is σ = 897754644. Its totient is φ = 897607600.

The previous prime is 897681119. The next prime is 897681131. The reversal of 897681121 is 121186798.

It is a happy 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, and also an emirpimes, since its reverse is a distinct semiprime: 121186798 = 2 ⋅60593399.

It can be written as a sum of positive squares in 2 ways, for example, as 187991521 + 709689600 = 13711^2 + 26640^2 .

It is a cyclic number.

It is not a de Polignac number, because 897681121 - 2¹ = 897681119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897681131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13570 + ... + 44491.

It is an arithmetic number, because the mean of its divisors is an integer number (224438661).

Almost surely, 2^897681121 is an apocalyptic number.

It is an amenable number.

897681121 is a deficient number, since it is larger than the sum of its proper divisors (73523).

897681121 is a wasteful number, since it uses less digits than its factorization.

897681121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73522.

The product of its digits is 48384, while the sum is 43.

The square root of 897681121 is about 29961.3270901007. The cubic root of 897681121 is about 964.6594665903.

The spelling of 897681121 in words is "eight hundred ninety-seven million, six hundred eighty-one thousand, one hundred twenty-one".