320998 has 4 divisors (see below), whose sum is σ = 481500. Its totient is φ = 160498.

The previous prime is 320953. The next prime is 321007. The reversal of 320998 is 899023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899023 = 19 ⋅47317.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 80248 + ... + 80251.

It is an arithmetic number, because the mean of its divisors is an integer number (120375).

2³²⁰⁹⁹⁸ is an apocalyptic number.

320998 is a deficient number, since it is larger than the sum of its proper divisors (160502).

320998 is a wasteful number, since it uses less digits than its factorization.

320998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160501.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 320998 is about 566.5668539546. The cubic root of 320998 is about 68.4700705735.

The spelling of 320998 in words is "three hundred twenty thousand, nine hundred ninety-eight".