687316512 has 48 divisors (see below), whose sum is σ = 1810160352. Its totient is φ = 228349440.

The previous prime is 687316493. The next prime is 687316517. The reversal of 687316512 is 215613786.

687316512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×687316512² = 944807975335692288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (687316517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17812 + ... + 41132.

It is an arithmetic number, because the mean of its divisors is an integer number (37711674).

Almost surely, 2^687316512 is an apocalyptic number.

It is an amenable number.

687316512 is an abundant number, since it is smaller than the sum of its proper divisors (1122843840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687316512 is a wasteful number, since it uses less digits than its factorization.

687316512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23641 (or 23633 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 687316512 is about 26216.7219918891. The cubic root of 687316512 is about 882.5085584748.

The spelling of 687316512 in words is "six hundred eighty-seven million, three hundred sixteen thousand, five hundred twelve".