87111065 has 8 divisors (see below), whose sum is σ = 106505928. Its totient is φ = 68373760.

The previous prime is 87110999. The next prime is 87111083. The reversal of 87111065 is 56011178.

It can be written as a sum of positive squares in 4 ways, for example, as 10705984 + 76405081 = 3272^2 + 8741^2 .

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

It is not a de Polignac number, because 87111065 - 2²⁰ = 86062489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 164096 + ... + 164625.

It is an arithmetic number, because the mean of its divisors is an integer number (13313241).

Almost surely, 2^87111065 is an apocalyptic number.

It is an amenable number.

87111065 is a deficient number, since it is larger than the sum of its proper divisors (19394863).

87111065 is a wasteful number, since it uses less digits than its factorization.

87111065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328779.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 87111065 is about 9333.3308630949. The cubic root of 87111065 is about 443.2932391929.

The spelling of 87111065 in words is "eighty-seven million, one hundred eleven thousand, sixty-five".