687081012 has 24 divisors (see below), whose sum is σ = 1623484800. Its totient is φ = 226127616.

The previous prime is 687081007. The next prime is 687081013. The reversal of 687081012 is 210180786.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687081013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361437 + ... + 363332.

It is an arithmetic number, because the mean of its divisors is an integer number (67645200).

Almost surely, 2^687081012 is an apocalyptic number.

It is an amenable number.

687081012 is an abundant number, since it is smaller than the sum of its proper divisors (936403788).

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

687081012 is a wasteful number, since it uses less digits than its factorization.

687081012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724855 (or 724853 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 687081012 is about 26212.2301988976. The cubic root of 687081012 is about 882.4077536281.

The spelling of 687081012 in words is "six hundred eighty-seven million, eighty-one thousand, twelve".