1680902807 has 2 divisors, whose sum is σ = 1680902808. Its totient is φ = 1680902806.

The previous prime is 1680902779. The next prime is 1680902819. The reversal of 1680902807 is 7082090861.

It is a strong prime.

It is an emirp because it is prime and its reverse (7082090861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680902807 - 2¹⁴ = 1680886423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680902837) 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, 840451403 + 840451404.

It is an arithmetic number, because the mean of its divisors is an integer number (840451404).

Almost surely, 2^1680902807 is an apocalyptic number.

1680902807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680902807 is an equidigital number, since it uses as much as digits as its factorization.

1680902807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1680902807 is about 40998.8147023789. The cubic root of 1680902807 is about 1188.9972974333.

The spelling of 1680902807 in words is "one billion, six hundred eighty million, nine hundred two thousand, eight hundred seven".