687388207 has 16 divisors (see below), whose sum is σ = 774489600. Its totient is φ = 604690240.

The previous prime is 687388201. The next prime is 687388211. The reversal of 687388207 is 702883786.

It is a de Polignac number, because none of the positive numbers 2^k-687388207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687388201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38544 + ... + 53482.

It is an arithmetic number, because the mean of its divisors is an integer number (48405600).

Almost surely, 2^687388207 is an apocalyptic number.

687388207 is a deficient number, since it is larger than the sum of its proper divisors (87101393).

687388207 is a wasteful number, since it uses less digits than its factorization.

687388207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15086.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 687388207 is about 26218.0893087197. The cubic root of 687388207 is about 882.5392426648.

The spelling of 687388207 in words is "six hundred eighty-seven million, three hundred eighty-eight thousand, two hundred seven".