997297 has 6 divisors (see below), whose sum is σ = 1160178. Its totient is φ = 854784.

The previous prime is 997279. The next prime is 997307. The reversal of 997297 is 792799.

It can be written as a sum of positive squares in only one way, i.e., 802816 + 194481 = 896^2 + 441^2 .

It is not a de Polignac number, because 997297 - 2¹⁹ = 473009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10128 + ... + 10225.

It is an arithmetic number, because the mean of its divisors is an integer number (193363).

2⁹⁹⁷²⁹⁷ is an apocalyptic number.

It is an amenable number.

997297 is a deficient number, since it is larger than the sum of its proper divisors (162881).

997297 is a wasteful number, since it uses less digits than its factorization.

997297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20367 (or 20360 counting only the distinct ones).

The product of its digits is 71442, while the sum is 43.

The square root of 997297 is about 998.6475854875. The cubic root of 997297 is about 99.9098186978.

It can be divided in two parts, 99 and 7297, that added together give a square (7396 = 86²).

The spelling of 997297 in words is "nine hundred ninety-seven thousand, two hundred ninety-seven".