687087313 has 16 divisors (see below), whose sum is σ = 766900224. Its totient is φ = 610215760.

The previous prime is 687087281. The next prime is 687087337. The reversal of 687087313 is 313780786.

687087313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 687087313 - 2⁵ = 687087281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 687087313.

It is not an unprimeable number, because it can be changed into a prime (687088313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426756 + ... + 428362.

It is an arithmetic number, because the mean of its divisors is an integer number (47931264).

Almost surely, 2^687087313 is an apocalyptic number.

It is an amenable number.

687087313 is a deficient number, since it is larger than the sum of its proper divisors (79812911).

687087313 is a wasteful number, since it uses less digits than its factorization.

687087313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 687087313 is about 26212.3503906079. The cubic root of 687087313 is about 882.4104510462.

The spelling of 687087313 in words is "six hundred eighty-seven million, eighty-seven thousand, three hundred thirteen".