679918241 has 2 divisors, whose sum is σ = 679918242. Its totient is φ = 679918240.

The previous prime is 679918237. The next prime is 679918243. The reversal of 679918241 is 142819976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386515600 + 293402641 = 19660^2 + 17129^2 .

It is a cyclic number.

It is not a de Polignac number, because 679918241 - 2² = 679918237 is a prime.

Together with 679918243, 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 (679918243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339959120 + 339959121.

It is an arithmetic number, because the mean of its divisors is an integer number (339959121).

Almost surely, 2^679918241 is an apocalyptic number.

It is an amenable number.

679918241 is a deficient number, since it is larger than the sum of its proper divisors (1).

679918241 is an equidigital number, since it uses as much as digits as its factorization.

679918241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 679918241 is about 26075.2419164233. The cubic root of 679918241 is about 879.3306898429.

The spelling of 679918241 in words is "six hundred seventy-nine million, nine hundred eighteen thousand, two hundred forty-one".