87481687 has 4 divisors (see below), whose sum is σ = 87649480. Its totient is φ = 87313896.

The previous prime is 87481679. The next prime is 87481717. The reversal of 87481687 is 78618478.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87481687 - 2³ = 87481679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87481687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87481607) 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 3 ways as a sum of consecutive naturals, for example, 83112 + ... + 84157.

It is an arithmetic number, because the mean of its divisors is an integer number (21912370).

Almost surely, 2^87481687 is an apocalyptic number.

87481687 is a deficient number, since it is larger than the sum of its proper divisors (167793).

87481687 is a wasteful number, since it uses less digits than its factorization.

87481687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167792.

The product of its digits is 602112, while the sum is 49.

The square root of 87481687 is about 9353.1645446875. The cubic root of 87481687 is about 443.9210269275.

The spelling of 87481687 in words is "eighty-seven million, four hundred eighty-one thousand, six hundred eighty-seven".