687328118 has 4 divisors (see below), whose sum is σ = 1030992180. Its totient is φ = 343664058.

The previous prime is 687328099. The next prime is 687328121. The reversal of 687328118 is 811823786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 811823786 = 2 ⋅405911893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171832028 + ... + 171832031.

It is an arithmetic number, because the mean of its divisors is an integer number (257748045).

Almost surely, 2^687328118 is an apocalyptic number.

687328118 is a deficient number, since it is larger than the sum of its proper divisors (343664062).

687328118 is a wasteful number, since it uses less digits than its factorization.

687328118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343664061.

The product of its digits is 129024, while the sum is 44.

The square root of 687328118 is about 26216.9433382307. The cubic root of 687328118 is about 882.5135257820.

The spelling of 687328118 in words is "six hundred eighty-seven million, three hundred twenty-eight thousand, one hundred eighteen".