687127312 has 20 divisors (see below), whose sum is σ = 1340130496. Its totient is φ = 341287200.

The previous prime is 687127303. The next prime is 687127313. The reversal of 687127312 is 213721786.

It is not an unprimeable number, because it can be changed into a prime (687127313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139788 + ... + 144619.

Almost surely, 2^687127312 is an apocalyptic number.

It is an amenable number.

687127312 is a deficient number, since it is larger than the sum of its proper divisors (653003184).

687127312 is a wasteful number, since it uses less digits than its factorization.

687127312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284566 (or 284560 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 687127312 is about 26213.1133595382. The cubic root of 687127312 is about 882.4275739796.

The spelling of 687127312 in words is "six hundred eighty-seven million, one hundred twenty-seven thousand, three hundred twelve".