679936321 has 2 divisors, whose sum is σ = 679936322. Its totient is φ = 679936320.

The previous prime is 679936303. The next prime is 679936351. The reversal of 679936321 is 123639976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 678863025 + 1073296 = 26055^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 679936321 - 2⁵ = 679936289 is a prime.

It is not a weakly prime, because it can be changed into another prime (679936351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339968160 + 339968161.

It is an arithmetic number, because the mean of its divisors is an integer number (339968161).

Almost surely, 2^679936321 is an apocalyptic number.

It is an amenable number.

679936321 is a deficient number, since it is larger than the sum of its proper divisors (1).

679936321 is an equidigital number, since it uses as much as digits as its factorization.

679936321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 46.

The square root of 679936321 is about 26075.5886031361. The cubic root of 679936321 is about 879.3384839947.

The spelling of 679936321 in words is "six hundred seventy-nine million, nine hundred thirty-six thousand, three hundred twenty-one".