687602496673 has 2 divisors, whose sum is σ = 687602496674. Its totient is φ = 687602496672.

The previous prime is 687602496667. The next prime is 687602496703. The reversal of 687602496673 is 376694206786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663488444304 + 24114052369 = 814548^2 + 155287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687602496673 is a prime.

It is not a weakly prime, because it can be changed into another prime (687602491673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343801248336 + 343801248337.

It is an arithmetic number, because the mean of its divisors is an integer number (343801248337).

Almost surely, 2^687602496673 is an apocalyptic number.

It is an amenable number.

687602496673 is a deficient number, since it is larger than the sum of its proper divisors (1).

687602496673 is an equidigital number, since it uses as much as digits as its factorization.

687602496673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109734912, while the sum is 64.

The spelling of 687602496673 in words is "six hundred eighty-seven billion, six hundred two million, four hundred ninety-six thousand, six hundred seventy-three".