687712437 has 40 divisors (see below), whose sum is σ = 1052758080. Its totient is φ = 447249600.

The previous prime is 687712427. The next prime is 687712457. The reversal of 687712437 is 734217786.

It is not a de Polignac number, because 687712437 - 2⁷ = 687712309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687712392 and 687712401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687712427) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 721153 + ... + 722105.

It is an arithmetic number, because the mean of its divisors is an integer number (26318952).

Almost surely, 2^687712437 is an apocalyptic number.

It is an amenable number.

687712437 is a deficient number, since it is larger than the sum of its proper divisors (365045643).

687712437 is a wasteful number, since it uses less digits than its factorization.

687712437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 1166 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 687712437 is about 26224.2719060034. The cubic root of 687712437 is about 882.6779807255.

The spelling of 687712437 in words is "six hundred eighty-seven million, seven hundred twelve thousand, four hundred thirty-seven".