1097797 has 2 divisors, whose sum is σ = 1097798. Its totient is φ = 1097796.

The previous prime is 1097791. The next prime is 1097819. The reversal of 1097797 is 7977901.

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., 720801 + 376996 = 849^2 + 614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097797 - 2⁷ = 1097669 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1097791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548898 + 548899.

It is an arithmetic number, because the mean of its divisors is an integer number (548899).

2^1097797 is an apocalyptic number.

It is an amenable number.

1097797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097797 is an equidigital number, since it uses as much as digits as its factorization.

1097797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 1097797 is about 1047.7580827653. The cubic root of 1097797 is about 103.1590529720.

The spelling of 1097797 in words is "one million, ninety-seven thousand, seven hundred ninety-seven".