1097897 has 2 divisors, whose sum is σ = 1097898. Its totient is φ = 1097896.

The previous prime is 1097893. The next prime is 1097903. The reversal of 1097897 is 7987901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1038361 + 59536 = 1019^2 + 244^2 .

It is an emirp because it is prime and its reverse (7987901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1097897 - 2² = 1097893 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1097891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548948 + 548949.

It is an arithmetic number, because the mean of its divisors is an integer number (548949).

2^1097897 is an apocalyptic number.

It is an amenable number.

1097897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097897 is an equidigital number, since it uses as much as digits as its factorization.

1097897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 1097897 is about 1047.8058026180. The cubic root of 1097897 is about 103.1621851820.

The spelling of 1097897 in words is "one million, ninety-seven thousand, eight hundred ninety-seven".