321863 has 4 divisors (see below), whose sum is σ = 330600. Its totient is φ = 313128.

The previous prime is 321851. The next prime is 321889. The reversal of 321863 is 368123.

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 321863 - 2⁴ = 321847 is a prime.

It is a d-powerful number, because it can be written as 3⁹ + 2¹¹ + 8³ + 1 + 6⁷ + 3⁹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321823) 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, 4313 + ... + 4386.

It is an arithmetic number, because the mean of its divisors is an integer number (82650).

2³²¹⁸⁶³ is an apocalyptic number.

321863 is a deficient number, since it is larger than the sum of its proper divisors (8737).

321863 is an equidigital number, since it uses as much as digits as its factorization.

321863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8736.

The product of its digits is 864, while the sum is 23.

The square root of 321863 is about 567.3297101334. The cubic root of 321863 is about 68.5315179873.

Adding to 321863 its reverse (368123), we get a palindrome (689986).

The spelling of 321863 in words is "three hundred twenty-one thousand, eight hundred sixty-three".