687712050 has 72 divisors (see below), whose sum is σ = 1956360276. Its totient is φ = 172600320.

The previous prime is 687712043. The next prime is 687712063. The reversal of 687712050 is 50217786.

It can be written as a sum of positive squares in 6 ways, for example, as 222576561 + 465135489 = 14919^2 + 21567^2 .

It is a junction number, because it is equal to n+sod(n) for n = 687711996 and 687712014.

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 35 ways as a sum of consecutive naturals, for example, 37299 + ... + 52598.

Almost surely, 2^687712050 is an apocalyptic number.

687712050 is an abundant number, since it is smaller than the sum of its proper divisors (1268648226).

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

687712050 is a wasteful number, since it uses less digits than its factorization.

687712050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89932 (or 89924 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 687712050 is about 26224.2645273418. The cubic root of 687712050 is about 882.6778151541.

The spelling of 687712050 in words is "six hundred eighty-seven million, seven hundred twelve thousand, fifty".