1680602689 has 2 divisors, whose sum is σ = 1680602690. Its totient is φ = 1680602688.

The previous prime is 1680602683. The next prime is 1680602743. The reversal of 1680602689 is 9862060861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1529435664 + 151167025 = 39108^2 + 12295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680602689 - 2³ = 1680602681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680602681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840301344 + 840301345.

It is an arithmetic number, because the mean of its divisors is an integer number (840301345).

Almost surely, 2^1680602689 is an apocalyptic number.

It is an amenable number.

1680602689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680602689 is an equidigital number, since it uses as much as digits as its factorization.

1680602689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 1680602689 is about 40995.1544575697. The cubic root of 1680602689 is about 1188.9265297623.

The spelling of 1680602689 in words is "one billion, six hundred eighty million, six hundred two thousand, six hundred eighty-nine".