687405087 has 18 divisors (see below), whose sum is σ = 1005116112. Its totient is φ = 452707896.

The previous prime is 687405079. The next prime is 687405107. The reversal of 687405087 is 780504786.

It is not a de Polignac number, because 687405087 - 2³ = 687405079 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687404087) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 56458 + ... + 67544.

It is an arithmetic number, because the mean of its divisors is an integer number (55839784).

Almost surely, 2^687405087 is an apocalyptic number.

687405087 is a deficient number, since it is larger than the sum of its proper divisors (317711025).

687405087 is a wasteful number, since it uses less digits than its factorization.

687405087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11259 (or 11173 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 687405087 is about 26218.4112218876. The cubic root of 687405087 is about 882.5464666955.

The spelling of 687405087 in words is "six hundred eighty-seven million, four hundred five thousand, eighty-seven".