997123 has 2 divisors, whose sum is σ = 997124. Its totient is φ = 997122.

The previous prime is 997121. The next prime is 997141. The reversal of 997123 is 321799.

It is a weak prime.

It is an emirp because it is prime and its reverse (321799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997123 - 2¹ = 997121 is a prime.

Together with 997121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (997121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498561 + 498562.

It is an arithmetic number, because the mean of its divisors is an integer number (498562).

2⁹⁹⁷¹²³ is an apocalyptic number.

997123 is a deficient number, since it is larger than the sum of its proper divisors (1).

997123 is an equidigital number, since it uses as much as digits as its factorization.

997123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 31.

The square root of 997123 is about 998.5604638679. The cubic root of 997123 is about 99.9040078846.

The spelling of 997123 in words is "nine hundred ninety-seven thousand, one hundred twenty-three".