687099124 has 6 divisors (see below), whose sum is σ = 1202423474. Its totient is φ = 343549560.

The previous prime is 687099089. The next prime is 687099151. The reversal of 687099124 is 421990786.

687099124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 680688100 + 6411024 = 26090^2 + 2532^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85887387 + ... + 85887394.

Almost surely, 2^687099124 is an apocalyptic number.

It is an amenable number.

687099124 is a deficient number, since it is larger than the sum of its proper divisors (515324350).

687099124 is a wasteful number, since it uses less digits than its factorization.

687099124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171774785 (or 171774783 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 687099124 is about 26212.5756842017. The cubic root of 687099124 is about 882.4155072159.

The spelling of 687099124 in words is "six hundred eighty-seven million, ninety-nine thousand, one hundred twenty-four".