197321 has 4 divisors (see below), whose sum is σ = 202692. Its totient is φ = 191952.

The previous prime is 197311. The next prime is 197339. The reversal of 197321 is 123791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190096 + 7225 = 436^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 197321 - 2⁶ = 197257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2630 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (50673).

2¹⁹⁷³²¹ is an apocalyptic number.

It is an amenable number.

197321 is a deficient number, since it is larger than the sum of its proper divisors (5371).

197321 is an equidigital number, since it uses as much as digits as its factorization.

197321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370.

The product of its digits is 378, while the sum is 23.

The square root of 197321 is about 444.2082844793. The cubic root of 197321 is about 58.2180653484.

The spelling of 197321 in words is "one hundred ninety-seven thousand, three hundred twenty-one".