687513144 has 16 divisors (see below), whose sum is σ = 1718782920. Its totient is φ = 229171040.

The previous prime is 687513139. The next prime is 687513209. The reversal of 687513144 is 441315786.

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, 14323167 + ... + 14323214.

Almost surely, 2^687513144 is an apocalyptic number.

It is an amenable number.

687513144 is an abundant number, since it is smaller than the sum of its proper divisors (1031269776).

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

687513144 is a wasteful number, since it uses less digits than its factorization.

687513144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28646390 (or 28646386 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 687513144 is about 26220.4718493013. The cubic root of 687513144 is about 882.5927083894.

The spelling of 687513144 in words is "six hundred eighty-seven million, five hundred thirteen thousand, one hundred forty-four".