687717007 has 2 divisors, whose sum is σ = 687717008. Its totient is φ = 687717006.

The previous prime is 687716977. The next prime is 687717053. The reversal of 687717007 is 700717786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687717007 - 2¹⁹ = 687192719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687717077) 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, 343858503 + 343858504.

It is an arithmetic number, because the mean of its divisors is an integer number (343858504).

Almost surely, 2^687717007 is an apocalyptic number.

687717007 is a deficient number, since it is larger than the sum of its proper divisors (1).

687717007 is an equidigital number, since it uses as much as digits as its factorization.

687717007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115248, while the sum is 43.

The square root of 687717007 is about 26224.3590388783. The cubic root of 687717007 is about 882.6799359174.

The spelling of 687717007 in words is "six hundred eighty-seven million, seven hundred seventeen thousand, seven".