676321 has 4 divisors (see below), whose sum is σ = 678832. Its totient is φ = 673812.

The previous prime is 676297. The next prime is 676337. The reversal of 676321 is 123676.

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.

It is a cyclic number.

It is not a de Polignac number, because 676321 - 2⁵ = 676289 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676391) 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, 795 + ... + 1408.

It is an arithmetic number, because the mean of its divisors is an integer number (169708).

2⁶⁷⁶³²¹ is an apocalyptic number.

It is an amenable number.

676321 is a deficient number, since it is larger than the sum of its proper divisors (2511).

676321 is a wasteful number, since it uses less digits than its factorization.

676321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510.

The product of its digits is 1512, while the sum is 25.

The square root of 676321 is about 822.3873783078. The cubic root of 676321 is about 87.7777189671. Note that the first 4 decimals are identical.

Adding to 676321 its reverse (123676), we get a palindrome (799997).

The spelling of 676321 in words is "six hundred seventy-six thousand, three hundred twenty-one".