687873268 has 6 divisors (see below), whose sum is σ = 1203778226. Its totient is φ = 343936632.

The previous prime is 687873239. The next prime is 687873287. The reversal of 687873268 is 862378786.

It can be written as a sum of positive squares in only one way, i.e., 644550544 + 43322724 = 25388^2 + 6582^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85984155 + ... + 85984162.

Almost surely, 2^687873268 is an apocalyptic number.

It is an amenable number.

687873268 is a deficient number, since it is larger than the sum of its proper divisors (515904958).

687873268 is a wasteful number, since it uses less digits than its factorization.

687873268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171968321 (or 171968319 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 55.

The square root of 687873268 is about 26227.3381798459. The cubic root of 687873268 is about 882.7467841524.

The spelling of 687873268 in words is "six hundred eighty-seven million, eight hundred seventy-three thousand, two hundred sixty-eight".