1680711679 has 2 divisors, whose sum is σ = 1680711680. Its totient is φ = 1680711678.

The previous prime is 1680711677. The next prime is 1680711713. The reversal of 1680711679 is 9761170861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680711679 - 2¹ = 1680711677 is a prime.

Together with 1680711677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680711677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840355839 + 840355840.

It is an arithmetic number, because the mean of its divisors is an integer number (840355840).

Almost surely, 2^1680711679 is an apocalyptic number.

1680711679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680711679 is an equidigital number, since it uses as much as digits as its factorization.

1680711679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 1680711679 is about 40996.4837394623. The cubic root of 1680711679 is about 1188.9522305227.

The spelling of 1680711679 in words is "one billion, six hundred eighty million, seven hundred eleven thousand, six hundred seventy-nine".