687077118 has 144 divisors (see below), whose sum is σ = 1926078336. Its totient is φ = 175271040.

The previous prime is 687077081. The next prime is 687077123. The reversal of 687077118 is 811770786.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 354480 + ... + 356412.

It is an arithmetic number, because the mean of its divisors is an integer number (13375544).

Almost surely, 2^687077118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687077118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963039168).

687077118 is an abundant number, since it is smaller than the sum of its proper divisors (1239001218).

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

687077118 is a wasteful number, since it uses less digits than its factorization.

687077118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 45.

The square root of 687077118 is about 26212.1559204885. The cubic root of 687077118 is about 882.4060866232.

The spelling of 687077118 in words is "six hundred eighty-seven million, seventy-seven thousand, one hundred eighteen".