687671608 has 32 divisors (see below), whose sum is σ = 1414778400. Its totient is φ = 311395968.

The previous prime is 687671597. The next prime is 687671629. The reversal of 687671608 is 806176786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56868 + ... + 67891.

It is an arithmetic number, because the mean of its divisors is an integer number (44211825).

Almost surely, 2^687671608 is an apocalyptic number.

It is an amenable number.

687671608 is an abundant number, since it is smaller than the sum of its proper divisors (727106792).

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

687671608 is a wasteful number, since it uses less digits than its factorization.

687671608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124831 (or 124827 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 687671608 is about 26223.4934362300. The cubic root of 687671608 is about 882.6605123911.

The spelling of 687671608 in words is "six hundred eighty-seven million, six hundred seventy-one thousand, six hundred eight".