687132842 has 8 divisors (see below), whose sum is σ = 1124399232. Its totient is φ = 312333100.

The previous prime is 687132827. The next prime is 687132881. The reversal of 687132842 is 248231786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 687132842.

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, 15616634 + ... + 15616677.

It is an arithmetic number, because the mean of its divisors is an integer number (140549904).

Almost surely, 2^687132842 is an apocalyptic number.

687132842 is a deficient number, since it is larger than the sum of its proper divisors (437266390).

687132842 is a wasteful number, since it uses less digits than its factorization.

687132842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31233324.

The product of its digits is 129024, while the sum is 41.

The square root of 687132842 is about 26213.2188408826. The cubic root of 687132842 is about 882.4299412320.

The spelling of 687132842 in words is "six hundred eighty-seven million, one hundred thirty-two thousand, eight hundred forty-two".