997243 has 8 divisors (see below), whose sum is σ = 1100736. Its totient is φ = 897600.

The previous prime is 997219. The next prime is 997247. The reversal of 997243 is 342799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997199 and 997208.

It is not an unprimeable number, because it can be changed into a prime (997247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403 + ... + 1468.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2⁹⁹⁷²⁴³ is an apocalyptic number.

997243 is a deficient number, since it is larger than the sum of its proper divisors (103493).

997243 is a wasteful number, since it uses less digits than its factorization.

997243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925.

The product of its digits is 13608, while the sum is 34.

The square root of 997243 is about 998.6205485569. The cubic root of 997243 is about 99.9080154143.

The spelling of 997243 in words is "nine hundred ninety-seven thousand, two hundred forty-three".