997403 has 6 divisors (see below), whose sum is σ = 1096452. Its totient is φ = 906620.

The previous prime is 997391. The next prime is 997427. The reversal of 997403 is 304799.

It is a happy number.

It is not a de Polignac number, because 997403 - 2⁸ = 997147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997403.

It is not an unprimeable number, because it can be changed into a prime (997433) 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 in 5 ways as a sum of consecutive naturals, for example, 4001 + ... + 4242.

It is an arithmetic number, because the mean of its divisors is an integer number (182742).

2⁹⁹⁷⁴⁰³ is an apocalyptic number.

997403 is a deficient number, since it is larger than the sum of its proper divisors (99049).

997403 is a wasteful number, since it uses less digits than its factorization.

997403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265 (or 8254 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 997403 is about 998.7006558524. The cubic root of 997403 is about 99.9133582871.

The spelling of 997403 in words is "nine hundred ninety-seven thousand, four hundred three".