897938161 has 2 divisors, whose sum is σ = 897938162. Its totient is φ = 897938160.

The previous prime is 897938159. The next prime is 897938189. The reversal of 897938161 is 161839798.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 893711025 + 4227136 = 29895^2 + 2056^2 .

It is a cyclic number.

It is not a de Polignac number, because 897938161 - 2¹ = 897938159 is a prime.

Together with 897938159, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 897938099 and 897938108.

It is not a weakly prime, because it can be changed into another prime (897938131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448969080 + 448969081.

It is an arithmetic number, because the mean of its divisors is an integer number (448969081).

Almost surely, 2^897938161 is an apocalyptic number.

It is an amenable number.

897938161 is a deficient number, since it is larger than the sum of its proper divisors (1).

897938161 is an equidigital number, since it uses as much as digits as its factorization.

897938161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 897938161 is about 29965.6163127008. The cubic root of 897938161 is about 964.7515306135.

The spelling of 897938161 in words is "eight hundred ninety-seven million, nine hundred thirty-eight thousand, one hundred sixty-one".