687776964 has 48 divisors (see below), whose sum is σ = 1838153856. Its totient is φ = 196070400.

The previous prime is 687776941. The next prime is 687776993. The reversal of 687776964 is 469677786.

687776964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 687776898 and 687776907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29844 + ... + 47604.

It is an arithmetic number, because the mean of its divisors is an integer number (38294872).

Almost surely, 2^687776964 is an apocalyptic number.

It is an amenable number.

687776964 is an abundant number, since it is smaller than the sum of its proper divisors (1150376892).

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

687776964 is a wasteful number, since it uses less digits than its factorization.

687776964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18236 (or 18234 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 60.

The square root of 687776964 is about 26225.5021686907. The cubic root of 687776964 is about 882.7055866344.

The spelling of 687776964 in words is "six hundred eighty-seven million, seven hundred seventy-six thousand, nine hundred sixty-four".