397321 has 4 divisors (see below), whose sum is σ = 402192. Its totient is φ = 392452.

The previous prime is 397303. The next prime is 397337. The reversal of 397321 is 123793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123793 = 79 ⋅1567.

It is a cyclic number.

It is not a de Polignac number, because 397321 - 2⁵ = 397289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2311 + ... + 2476.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2³⁹⁷³²¹ is an apocalyptic number.

It is an amenable number.

397321 is a deficient number, since it is larger than the sum of its proper divisors (4871).

397321 is an equidigital number, since it uses as much as digits as its factorization.

397321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4870.

The product of its digits is 1134, while the sum is 25.

The square root of 397321 is about 630.3340384272. The cubic root of 397321 is about 73.5157693655.

The spelling of 397321 in words is "three hundred ninety-seven thousand, three hundred twenty-one".