679321 has 4 divisors (see below), whose sum is σ = 688000. Its totient is φ = 670644.

The previous prime is 679319. The next prime is 679333. The reversal of 679321 is 123976.

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 679321 - 2¹ = 679319 is a prime.

It is a super-2 number, since 2×679321² = 922954042082, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 679321.

It is not an unprimeable number, because it can be changed into a prime (679361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4221 + ... + 4378.

It is an arithmetic number, because the mean of its divisors is an integer number (172000).

2⁶⁷⁹³²¹ is an apocalyptic number.

It is an amenable number.

679321 is a deficient number, since it is larger than the sum of its proper divisors (8679).

679321 is an equidigital number, since it uses as much as digits as its factorization.

679321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8678.

The product of its digits is 2268, while the sum is 28.

The square root of 679321 is about 824.2093180740. The cubic root of 679321 is about 87.9073146041.

It can be divided in two parts, 679 and 321, that added together give a cube (1000 = 10³).

The spelling of 679321 in words is "six hundred seventy-nine thousand, three hundred twenty-one".