863321 has 4 divisors (see below), whose sum is σ = 886692. Its totient is φ = 839952.

The previous prime is 863309. The next prime is 863323. The reversal of 863321 is 123368.

863321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 373321 + 490000 = 611^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 863321 - 2¹⁰ = 862297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (863323) 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, 11630 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (221673).

2⁸⁶³³²¹ is an apocalyptic number.

It is an amenable number.

863321 is a deficient number, since it is larger than the sum of its proper divisors (23371).

863321 is a wasteful number, since it uses less digits than its factorization.

863321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23370.

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

The square root of 863321 is about 929.1506874560. The cubic root of 863321 is about 95.2191064563.

Adding to 863321 its reverse (123368), we get a palindrome (986689).

The spelling of 863321 in words is "eight hundred sixty-three thousand, three hundred twenty-one".