687016405 has 8 divisors (see below), whose sum is σ = 824688000. Its totient is φ = 549434256.

The previous prime is 687016403. The next prime is 687016423. The reversal of 687016405 is 504610786.

687016405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 687016405 - 2¹ = 687016403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687016403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4105 + ... + 37294.

It is an arithmetic number, because the mean of its divisors is an integer number (103086000).

Almost surely, 2^687016405 is an apocalyptic number.

It is an amenable number.

687016405 is a deficient number, since it is larger than the sum of its proper divisors (137671595).

687016405 is a wasteful number, since it uses less digits than its factorization.

687016405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44723.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 687016405 is about 26210.9977871885. The cubic root of 687016405 is about 882.3800948302.

The spelling of 687016405 in words is "six hundred eighty-seven million, sixteen thousand, four hundred five".