87871189 has 16 divisors (see below), whose sum is σ = 106704000. Its totient is φ = 70749504.

The previous prime is 87871169. The next prime is 87871207. The reversal of 87871189 is 98117878.

It is a de Polignac number, because none of the positive numbers 2^k-87871189 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 (87871129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1662 + ... + 13360.

It is an arithmetic number, because the mean of its divisors is an integer number (6669000).

Almost surely, 2^87871189 is an apocalyptic number.

It is an amenable number.

87871189 is a deficient number, since it is larger than the sum of its proper divisors (18832811).

87871189 is a wasteful number, since it uses less digits than its factorization.

87871189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11772.

The product of its digits is 225792, while the sum is 49.

The square root of 87871189 is about 9373.9633560197. The cubic root of 87871189 is about 444.5788870614.

The spelling of 87871189 in words is "eighty-seven million, eight hundred seventy-one thousand, one hundred eighty-nine".