687368834 has 8 divisors (see below), whose sum is σ = 1032793740. Its totient is φ = 343104256.

The previous prime is 687368743. The next prime is 687368839. The reversal of 687368834 is 438863786.

It can be written as a sum of positive squares in 2 ways, for example, as 682515625 + 4853209 = 26125^2 + 2203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (687368839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288599 + ... + 290970.

Almost surely, 2^687368834 is an apocalyptic number.

687368834 is a deficient number, since it is larger than the sum of its proper divisors (345424906).

687368834 is a wasteful number, since it uses less digits than its factorization.

687368834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580164.

The product of its digits is 4644864, while the sum is 53.

The square root of 687368834 is about 26217.7198474619. The cubic root of 687368834 is about 882.5309515744.

The spelling of 687368834 in words is "six hundred eighty-seven million, three hundred sixty-eight thousand, eight hundred thirty-four".