87812085 has 16 divisors (see below), whose sum is σ = 140684544. Its totient is φ = 46771392.

The previous prime is 87812083. The next prime is 87812147. The reversal of 87812085 is 58021878.

It is not a de Polignac number, because 87812085 - 2¹ = 87812083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87812083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9364 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (8792784).

Almost surely, 2^87812085 is an apocalyptic number.

It is an amenable number.

87812085 is a deficient number, since it is larger than the sum of its proper divisors (52872459).

87812085 is a wasteful number, since it uses less digits than its factorization.

87812085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7724.

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 87812085 is about 9370.8102637926. The cubic root of 87812085 is about 444.4791870179.

The spelling of 87812085 in words is "eighty-seven million, eight hundred twelve thousand, eighty-five".