320197 has 4 divisors (see below), whose sum is σ = 323596. Its totient is φ = 316800.

The previous prime is 320179. The next prime is 320209. The reversal of 320197 is 791023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791023 = 37 ⋅21379.

It can be written as a sum of positive squares in 2 ways, for example, as 103041 + 217156 = 321^2 + 466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320197 is a prime.

It is a super-2 number, since 2×320197² = 205052237618, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1554 + ... + 1747.

It is an arithmetic number, because the mean of its divisors is an integer number (80899).

2³²⁰¹⁹⁷ is an apocalyptic number.

It is an amenable number.

320197 is a deficient number, since it is larger than the sum of its proper divisors (3399).

320197 is an equidigital number, since it uses as much as digits as its factorization.

320197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3398.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 320197 is about 565.8595232034. The cubic root of 320197 is about 68.4130710403.

The spelling of 320197 in words is "three hundred twenty thousand, one hundred ninety-seven".