687091112 has 8 divisors (see below), whose sum is σ = 1288295850. Its totient is φ = 343545552.

The previous prime is 687091087. The next prime is 687091117. The reversal of 687091112 is 211190786.

It can be written as a sum of positive squares in only one way, i.e., 513747556 + 173343556 = 22666^2 + 13166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (687091117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42943187 + ... + 42943202.

Almost surely, 2^687091112 is an apocalyptic number.

It is an amenable number.

687091112 is a deficient number, since it is larger than the sum of its proper divisors (601204738).

687091112 is a wasteful number, since it uses less digits than its factorization.

687091112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85886395 (or 85886391 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 687091112 is about 26212.4228563481. The cubic root of 687091112 is about 882.4120773660.

The spelling of 687091112 in words is "six hundred eighty-seven million, ninety-one thousand, one hundred twelve".