687219064 has 16 divisors (see below), whose sum is σ = 1472612400. Its totient is φ = 294522432.

The previous prime is 687219031. The next prime is 687219121. The reversal of 687219064 is 460912786.

It is a self number, because there is not a number n which added to its sum of digits gives 687219064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135829 + ... + 6135940.

It is an arithmetic number, because the mean of its divisors is an integer number (92038275).

Almost surely, 2^687219064 is an apocalyptic number.

It is an amenable number.

687219064 is an abundant number, since it is smaller than the sum of its proper divisors (785393336).

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

687219064 is a wasteful number, since it uses less digits than its factorization.

687219064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12271782 (or 12271778 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 687219064 is about 26214.8634175347. The cubic root of 687219064 is about 882.4668490357.

The spelling of 687219064 in words is "six hundred eighty-seven million, two hundred nineteen thousand, sixty-four".