997143 has 16 divisors (see below), whose sum is σ = 1537536. Its totient is φ = 563040.

The previous prime is 997141. The next prime is 997147. The reversal of 997143 is 341799.

It is not a de Polignac number, because 997143 - 2¹ = 997141 is a prime.

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 997143.

It is not an unprimeable number, because it can be changed into a prime (997141) 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 15 ways as a sum of consecutive naturals, for example, 1933 + ... + 2393.

It is an arithmetic number, because the mean of its divisors is an integer number (96096).

2⁹⁹⁷¹⁴³ is an apocalyptic number.

997143 is a deficient number, since it is larger than the sum of its proper divisors (540393).

997143 is a wasteful number, since it uses less digits than its factorization.

997143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574.

The product of its digits is 6804, while the sum is 33.

The square root of 997143 is about 998.5704782338. The cubic root of 997143 is about 99.9046758286.

The spelling of 997143 in words is "nine hundred ninety-seven thousand, one hundred forty-three".