687305087 has 8 divisors (see below), whose sum is σ = 831697056. Its totient is φ = 554464512.

The previous prime is 687305083. The next prime is 687305089. The reversal of 687305087 is 780503786.

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

It is not a de Polignac number, because 687305087 - 2² = 687305083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687305083) 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, 2887718 + ... + 2887955.

It is an arithmetic number, because the mean of its divisors is an integer number (103962132).

Almost surely, 2^687305087 is an apocalyptic number.

687305087 is a deficient number, since it is larger than the sum of its proper divisors (144391969).

687305087 is a wasteful number, since it uses less digits than its factorization.

687305087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775697.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 687305087 is about 26216.5040957028. The cubic root of 687305087 is about 882.5036685801.

The spelling of 687305087 in words is "six hundred eighty-seven million, three hundred five thousand, eighty-seven".