687071605 has 8 divisors (see below), whose sum is σ = 899439264. Its totient is φ = 499688400.

The previous prime is 687071599. The next prime is 687071629. The reversal of 687071605 is 506170786.

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

It is not a de Polignac number, because 687071605 - 2⁵ = 687071573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 6246051 + ... + 6246160.

It is an arithmetic number, because the mean of its divisors is an integer number (112429908).

Almost surely, 2^687071605 is an apocalyptic number.

It is an amenable number.

687071605 is a deficient number, since it is larger than the sum of its proper divisors (212367659).

687071605 is a wasteful number, since it uses less digits than its factorization.

687071605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12492227.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 687071605 is about 26212.0507591451. The cubic root of 687071605 is about 882.4037265205.

The spelling of 687071605 in words is "six hundred eighty-seven million, seventy-one thousand, six hundred five".