321923 has 4 divisors (see below), whose sum is σ = 367920. Its totient is φ = 275928.

The previous prime is 321911. The next prime is 321947. The reversal of 321923 is 329123.

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

It is a cyclic number.

It is not a de Polignac number, because 321923 - 2¹⁰ = 320899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321895 and 321904.

It is not an unprimeable number, because it can be changed into a prime (321983) 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, 22988 + ... + 23001.

It is an arithmetic number, because the mean of its divisors is an integer number (91980).

2³²¹⁹²³ is an apocalyptic number.

321923 is a deficient number, since it is larger than the sum of its proper divisors (45997).

321923 is an equidigital number, since it uses as much as digits as its factorization.

321923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45996.

The product of its digits is 324, while the sum is 20.

The square root of 321923 is about 567.3825869728. The cubic root of 321923 is about 68.5357761506.

The spelling of 321923 in words is "three hundred twenty-one thousand, nine hundred twenty-three".