997597 has 2 divisors, whose sum is σ = 997598. Its totient is φ = 997596.

The previous prime is 997589. The next prime is 997609. The reversal of 997597 is 795799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 942841 + 54756 = 971^2 + 234^2 .

It is an emirp because it is prime and its reverse (795799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997597 - 2³ = 997589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997547) 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 as a sum of consecutive naturals, namely, 498798 + 498799.

It is an arithmetic number, because the mean of its divisors is an integer number (498799).

2⁹⁹⁷⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

997597 is a deficient number, since it is larger than the sum of its proper divisors (1).

997597 is an equidigital number, since it uses as much as digits as its factorization.

997597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 178605, while the sum is 46.

The square root of 997597 is about 998.7977773303. The cubic root of 997597 is about 99.9198357541.

The spelling of 997597 in words is "nine hundred ninety-seven thousand, five hundred ninety-seven".