1680627671 has 2 divisors, whose sum is σ = 1680627672. Its totient is φ = 1680627670.

The previous prime is 1680627649. The next prime is 1680627709. The reversal of 1680627671 is 1767260861.

It is a weak prime.

It is an emirp because it is prime and its reverse (1767260861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680627671 - 2¹⁴ = 1680611287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680627631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840313835 + 840313836.

It is an arithmetic number, because the mean of its divisors is an integer number (840313836).

Almost surely, 2^1680627671 is an apocalyptic number.

1680627671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680627671 is an equidigital number, since it uses as much as digits as its factorization.

1680627671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 1680627671 is about 40995.4591509840. The cubic root of 1680627671 is about 1188.9324208266.

The spelling of 1680627671 in words is "one billion, six hundred eighty million, six hundred twenty-seven thousand, six hundred seventy-one".