87071181 has 8 divisors (see below), whose sum is σ = 116192160. Its totient is φ = 57998832.

The previous prime is 87071141. The next prime is 87071203. The reversal of 87071181 is 18117078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87071181 - 2²² = 82876877 is a prime.

It is a super-2 number, since 2×87071181² = 15162781121469522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87071111) 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 7 ways as a sum of consecutive naturals, for example, 7750 + ... + 15303.

It is an arithmetic number, because the mean of its divisors is an integer number (14524020).

Almost surely, 2^87071181 is an apocalyptic number.

It is an amenable number.

87071181 is a deficient number, since it is larger than the sum of its proper divisors (29120979).

87071181 is a wasteful number, since it uses less digits than its factorization.

87071181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24315.

The product of its (nonzero) digits is 3136, while the sum is 33.

The square root of 87071181 is about 9331.1939750495. The cubic root of 87071181 is about 443.2255745912.

The spelling of 87071181 in words is "eighty-seven million, seventy-one thousand, one hundred eighty-one".