1697 has 2 divisors, whose sum is σ = 1698. Its totient is φ = 1696.

The previous prime is 1693. The next prime is 1699. The reversal of 1697 is 7961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1681 + 16 = 41^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 1697 - 2² = 1693 is a prime.

Together with 1699, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (1693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848 + 849.

It is an arithmetic number, because the mean of its divisors is an integer number (849).

It is an amenable number.

1697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1697 is an equidigital number, since it uses as much as digits as its factorization.

1697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 23.

The square root of 1697 is about 41.1946598481. The cubic root of 1697 is about 11.9278072962.

The spelling of 1697 in words is "one thousand, six hundred ninety-seven".