687742012 has 12 divisors (see below), whose sum is σ = 1266893320. Its totient is φ = 325772496.

The previous prime is 687742001. The next prime is 687742039. The reversal of 687742012 is 210247786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4524543 + ... + 4524694.

Almost surely, 2^687742012 is an apocalyptic number.

It is an amenable number.

687742012 is a deficient number, since it is larger than the sum of its proper divisors (579151308).

687742012 is a wasteful number, since it uses less digits than its factorization.

687742012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049260 (or 9049258 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 687742012 is about 26224.8357859492. The cubic root of 687742012 is about 882.6906337016.

Adding to 687742012 its reverse (210247786), we get a palindrome (897989798).

The spelling of 687742012 in words is "six hundred eighty-seven million, seven hundred forty-two thousand, twelve".