87116641 has 4 divisors (see below), whose sum is σ = 87979284. Its totient is φ = 86254000.

The previous prime is 87116629. The next prime is 87116647. The reversal of 87116641 is 14661178.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66830625 + 20286016 = 8175^2 + 4504^2 .

It is not a de Polignac number, because 87116641 - 2⁹ = 87116129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87116597 and 87116606.

It is not an unprimeable number, because it can be changed into a prime (87116647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431170 + ... + 431371.

It is an arithmetic number, because the mean of its divisors is an integer number (21994821).

Almost surely, 2^87116641 is an apocalyptic number.

It is an amenable number.

87116641 is a deficient number, since it is larger than the sum of its proper divisors (862643).

87116641 is a wasteful number, since it uses less digits than its factorization.

87116641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862642.

The product of its digits is 8064, while the sum is 34.

The square root of 87116641 is about 9333.6295726796. The cubic root of 87116641 is about 443.3026974263.

The spelling of 87116641 in words is "eighty-seven million, one hundred sixteen thousand, six hundred forty-one".