687007663 has 2 divisors, whose sum is σ = 687007664. Its totient is φ = 687007662.

The previous prime is 687007661. The next prime is 687007667. The reversal of 687007663 is 366700786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687007663 - 2¹ = 687007661 is a prime.

Together with 687007661, 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 (687007661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343503831 + 343503832.

It is an arithmetic number, because the mean of its divisors is an integer number (343503832).

Almost surely, 2^687007663 is an apocalyptic number.

687007663 is a deficient number, since it is larger than the sum of its proper divisors (1).

687007663 is an equidigital number, since it uses as much as digits as its factorization.

687007663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 687007663 is about 26210.8310245974. The cubic root of 687007663 is about 882.3763521735.

The spelling of 687007663 in words is "six hundred eighty-seven million, seven thousand, six hundred sixty-three".