997583 has 2 divisors, whose sum is σ = 997584. Its totient is φ = 997582.

The previous prime is 997573. The next prime is 997589. The reversal of 997583 is 385799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997583 - 2⁸ = 997327 is a prime.

It is an Ulam number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 997583.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997583.

It is not a weakly prime, because it can be changed into another prime (997589) 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, 498791 + 498792.

It is an arithmetic number, because the mean of its divisors is an integer number (498792).

2⁹⁹⁷⁵⁸³ is an apocalyptic number.

997583 is a deficient number, since it is larger than the sum of its proper divisors (1).

997583 is an equidigital number, since it uses as much as digits as its factorization.

997583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 997583 is about 998.7907688800. The cubic root of 997583 is about 99.9193683362.

The spelling of 997583 in words is "nine hundred ninety-seven thousand, five hundred eighty-three".