679832609 has 2 divisors, whose sum is σ = 679832610. Its totient is φ = 679832608.

The previous prime is 679832579. The next prime is 679832611. The reversal of 679832609 is 906238976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343917025 + 335915584 = 18545^2 + 18328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679832609 is a prime.

Together with 679832611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (679832509) 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 as a sum of consecutive naturals, namely, 339916304 + 339916305.

It is an arithmetic number, because the mean of its divisors is an integer number (339916305).

Almost surely, 2^679832609 is an apocalyptic number.

It is an amenable number.

679832609 is a deficient number, since it is larger than the sum of its proper divisors (1).

679832609 is an equidigital number, since it uses as much as digits as its factorization.

679832609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 679832609 is about 26073.5998473552. The cubic root of 679832609 is about 879.2937726556.

The spelling of 679832609 in words is "six hundred seventy-nine million, eight hundred thirty-two thousand, six hundred nine".