87171187 has 8 divisors (see below), whose sum is σ = 90561600. Its totient is φ = 83806464.

The previous prime is 87171179. The next prime is 87171233. The reversal of 87171187 is 78117178.

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 87171187 - 2³ = 87171179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87171157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643 + ... + 13219.

It is an arithmetic number, because the mean of its divisors is an integer number (11320200).

Almost surely, 2^87171187 is an apocalyptic number.

87171187 is a deficient number, since it is larger than the sum of its proper divisors (3390413).

87171187 is a wasteful number, since it uses less digits than its factorization.

87171187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12845.

The product of its digits is 21952, while the sum is 40.

The square root of 87171187 is about 9336.5511298338. The cubic root of 87171187 is about 443.3951992482.

The spelling of 87171187 in words is "eighty-seven million, one hundred seventy-one thousand, one hundred eighty-seven".