87081687 has 24 divisors (see below), whose sum is σ = 156823680. Its totient is φ = 45236880.

The previous prime is 87081677. The next prime is 87081719. The reversal of 87081687 is 78618078.

It is not a de Polignac number, because 87081687 - 2⁷ = 87081559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87081607) 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 23 ways as a sum of consecutive naturals, for example, 62137 + ... + 63522.

It is an arithmetic number, because the mean of its divisors is an integer number (6534320).

Almost surely, 2^87081687 is an apocalyptic number.

87081687 is a deficient number, since it is larger than the sum of its proper divisors (69741993).

87081687 is a wasteful number, since it uses less digits than its factorization.

87081687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125683 (or 125680 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 87081687 is about 9331.7569085355. The cubic root of 87081687 is about 443.2434003921.

The spelling of 87081687 in words is "eighty-seven million, eighty-one thousand, six hundred eighty-seven".