687909368 has 32 divisors (see below), whose sum is σ = 1327089360. Its totient is φ = 334160640.

The previous prime is 687909361. The next prime is 687909401. The reversal of 687909368 is 863909786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687909361) 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, 30338 + ... + 47918.

Almost surely, 2^687909368 is an apocalyptic number.

It is an amenable number.

687909368 is a deficient number, since it is larger than the sum of its proper divisors (639179992).

687909368 is a wasteful number, since it uses less digits than its factorization.

687909368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17727 (or 17723 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 687909368 is about 26228.0263840038. The cubic root of 687909368 is about 882.7622262418.

The spelling of 687909368 in words is "six hundred eighty-seven million, nine hundred nine thousand, three hundred sixty-eight".