997329 has 8 divisors (see below), whose sum is σ = 1399840. Its totient is φ = 629856.

The previous prime is 997327. The next prime is 997333. The reversal of 997329 is 923799.

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

It is not a de Polignac number, because 997329 - 2¹ = 997327 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (997327) 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 7 ways as a sum of consecutive naturals, for example, 8692 + ... + 8805.

It is an arithmetic number, because the mean of its divisors is an integer number (174980).

2⁹⁹⁷³²⁹ is an apocalyptic number.

It is an amenable number.

997329 is a deficient number, since it is larger than the sum of its proper divisors (402511).

997329 is a wasteful number, since it uses less digits than its factorization.

997329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17519.

The product of its digits is 30618, while the sum is 39.

The square root of 997329 is about 998.6636070269. The cubic root of 997329 is about 99.9108872795.

It can be divided in two parts, 997 and 329, that added together give a triangular number (1326 = T₅₁).

The spelling of 997329 in words is "nine hundred ninety-seven thousand, three hundred twenty-nine".