687996139000 has 32 divisors (see below), whose sum is σ = 1609910967600. Its totient is φ = 275198455200.

The previous prime is 687996138983. The next prime is 687996139001. The reversal of 687996139000 is 931699786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687996139001) 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, 343997070 + ... + 343999069.

Almost surely, 2^687996139000 is an apocalyptic number.

It is an amenable number.

687996139000 is an abundant number, since it is smaller than the sum of its proper divisors (921914828600).

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

687996139000 is a wasteful number, since it uses less digits than its factorization.

687996139000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687996160 (or 687996146 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 687996139000 in words is "six hundred eighty-seven billion, nine hundred ninety-six million, one hundred thirty-nine thousand".