997443 has 18 divisors (see below), whose sum is σ = 1525524. Its totient is φ = 627912.

The previous prime is 997439. The next prime is 997453. The reversal of 997443 is 344799.

997443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 997443 - 2² = 997439 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 997398 and 997407.

It is not an unprimeable number, because it can be changed into a prime (997433) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3096 + ... + 3402.

2⁹⁹⁷⁴⁴³ is an apocalyptic number.

997443 is a deficient number, since it is larger than the sum of its proper divisors (528081).

997443 is a wasteful number, since it uses less digits than its factorization.

997443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 329 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 997443 is about 998.7206816723. The cubic root of 997443 is about 99.9146939161.

The spelling of 997443 in words is "nine hundred ninety-seven thousand, four hundred forty-three".