687634124 has 24 divisors (see below), whose sum is σ = 1235221008. Its totient is φ = 334748160.

The previous prime is 687634117. The next prime is 687634127. The reversal of 687634124 is 421436786.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (687634127) 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 7 ways as a sum of consecutive naturals, for example, 81764 + ... + 89780.

It is an arithmetic number, because the mean of its divisors is an integer number (51467542).

Almost surely, 2^687634124 is an apocalyptic number.

It is an amenable number.

687634124 is a deficient number, since it is larger than the sum of its proper divisors (547586884).

687634124 is a wasteful number, since it uses less digits than its factorization.

687634124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8585 (or 8583 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 687634124 is about 26222.7787238500. The cubic root of 687634124 is about 882.6444745772.

The spelling of 687634124 in words is "six hundred eighty-seven million, six hundred thirty-four thousand, one hundred twenty-four".