687723704 has 16 divisors (see below), whose sum is σ = 1289936400. Its totient is φ = 343740672.

The previous prime is 687723683. The next prime is 687723727. The reversal of 687723704 is 407327786.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11789 + ... + 38915.

It is an arithmetic number, because the mean of its divisors is an integer number (80621025).

Almost surely, 2^687723704 is an apocalyptic number.

It is an amenable number.

687723704 is a deficient number, since it is larger than the sum of its proper divisors (602212696).

687723704 is a wasteful number, since it uses less digits than its factorization.

687723704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30302 (or 30298 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 687723704 is about 26224.4867251964. The cubic root of 687723704 is about 882.6828010922.

The spelling of 687723704 in words is "six hundred eighty-seven million, seven hundred twenty-three thousand, seven hundred four".