897530759161 has 3 divisors (see below), whose sum is σ = 897531706543. Its totient is φ = 897529811780.

The previous prime is 897530759159. The next prime is 897530759173. The reversal of 897530759161 is 161957035798.

The square root of 897530759161 is 947381.

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 can be written as a sum of positive squares in only one way, i.e., 218258086761 + 679272672400 = 467181^2 + 824180^2 .

It is not a de Polignac number, because 897530759161 - 2¹ = 897530759159 is a prime.

It is a super-2 number, since 2×897530759161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 897530759161.

It is not an unprimeable number, because it can be changed into a prime (897530859161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 473691 + ... + 1421071.

Almost surely, 2^897530759161 is an apocalyptic number.

897530759161 is the 947381-st square number.

897530759161 is the 473691-st centered octagonal number.

It is an amenable number.

897530759161 is a deficient number, since it is larger than the sum of its proper divisors (947382).

897530759161 is an frugal number, since it uses more digits than its factorization.

897530759161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894762 (or 947381 counting only the distinct ones).

The product of its (nonzero) digits is 14288400, while the sum is 61.

The spelling of 897530759161 in words is "eight hundred ninety-seven billion, five hundred thirty million, seven hundred fifty-nine thousand, one hundred sixty-one".