87108281 has 4 divisors (see below), whose sum is σ = 93808932. Its totient is φ = 80407632.

The previous prime is 87108271. The next prime is 87108283. The reversal of 87108281 is 18280178.

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 49224256 + 37884025 = 7016^2 + 6155^2 .

It is a cyclic number.

It is not a de Polignac number, because 87108281 - 2¹⁴ = 87091897 is a prime.

It is a super-2 number, since 2×87108281² = 15175705237549922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87108283) 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 3 ways as a sum of consecutive naturals, for example, 3350306 + ... + 3350331.

It is an arithmetic number, because the mean of its divisors is an integer number (23452233).

Almost surely, 2^87108281 is an apocalyptic number.

It is an amenable number.

87108281 is a deficient number, since it is larger than the sum of its proper divisors (6700651).

87108281 is a wasteful number, since it uses less digits than its factorization.

87108281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700650.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 87108281 is about 9333.1817190067. The cubic root of 87108281 is about 443.2885167101.

The spelling of 87108281 in words is "eighty-seven million, one hundred eight thousand, two hundred eighty-one".